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Effect of irrigation regime on grain yield,water productivity,and methane emissions in dry direct-seeded rice grown in raised beds with wheat straw incorporation

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The Crop Journal 2018年第5期6卷 495-508页

作者： Zhiqin Wang Daojian Gu Sarah S.Beebout Hao Zhang Lijun Liu Jianchang Yang Jianhua Zhang Jiangsu Key Laboratory of Crop Genetics and Physiology Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou University Crop and Environmental Sciences Division International Rice Research Institute (IRRI) Department of Biology Hong Kong Baptist University

Dry direct-seeded rice grown in raised beds is becoming an important practice in the wheat–rice rotation system in ***,little information has been available on the effect of various irrigation regimes on grain yield,water productivity(WP),nitrogen use efficiency(NUE),and greenhouse gas emission in this *** study investigated the question using two rice cultivars in 2015 and 2016 grown in soil with wheat straw incorporated into *** seeds were directly seeded into raised beds,which were maintained under aerobic conditions during the early seedling *** irrigation regimes:continuous flooding(CF),alternate wetting and drying(AWD),and furrow irrigation(FI),were applied from 4.5-leaf-stage to *** with CF,both AWD and FI significantly increased grain yield,WP,and internal NUE,with greater increases under the FI *** two cultivars showed the same tendency in both *** AWD and FI markedly increased soil redox potential,root and shoot biomass,root oxidation activity,leaf photosynthetic NUE,and harvest index and markedly decreased global warming potential,owing to substantial reduction in seasonalThe results demonstrate that adoption of either AWD or FI could increase grain yield and resource-use efficiency and reduce environmental risks in dry direct-seeded rice grown on raised beds with wheat straw incorporation in the wheat–rice rotation system.

关键词： Rice(Oryza sativa L.) Dry direct-seeding Alternate wetting and drying Furrow irrigation Water productivity methane emission

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Quantification and prediction of enteric methane emissions from Chinese lactating Holstein dairy cows fed diets with different dietary neutral detergent fiber/non-fibrous carbohydrate(NDF/NFC)ratios

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Journal of Integrative Agriculture 2022年第3期21卷 797-811页

作者： DONG Li-feng JIA Peng LI Bin-chang WANG Bei YANG Chun-lei LIU Zhi-hao DIAO Qi-yu Feed Research Institute Chinese Academy of Agricultural Sciences/Sino-US Joint Lab on Nutrition and Metabolism of Ruminant/CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable AgricultureBeijing 100081P.R.China Institute of Ruminant Research College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou 730020P.R.China College of Biotechnology and Bioengineering Zhejiang University of TechnologyHangzhou 310014P.R.China

methane(CH_(4))emissions from ruminant production are a significant source of anthropogenic greenhouse gas production,but few studies have examined the enteric CH_(4)emissions of lactating dairy cows under different feeding regimes in *** study aimed to investigate the influence of different dietary neutral detergent fiber/non-fibrous carbohydrate(NDF/NFC)ratios on production performance,nutrient digestibility,and CH_(4)emissions for Holstein dairy cows at various stages of *** evaluated the performance of CH_(4)prediction equations developed using local dietary and milk production variables compared to previously published prediction equations developed in other production *** this purpose,36 lactating cows were assigned to one of three treatments with differing dietary NDF/NFC ratios:low(NDF/NFC=1.19),medium(NDF/NFC=1.54),and high(NDF/NFC=1.68).A modified acid-insoluble ash method was used to determine nutrient digestibility,while the sulfur hexafluoride technique was used to measure enteric CH4 *** results showed that the dry matter(DM)intake of cows at the early,middle,and late stages of lactation decreased significantly(Pemissions increased linearly(Pemissions expressed per unit of metabolic body weight,DM intake,NDF intake,or fat-corrected milk yield increased with increasing dietary NDF/NFC *** addition,CH_(4)emissions expressed per unit of GE intake increased significantly(P<0.05),from 4.87 to 8.12%,5.16 to 9.25%,and 5.06 to 8.17%respectiv

关键词： methane emission feeding regime prediction equation lactating dairy cow

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methane emissions from Grazing Holstein-Friesian Heifers at Different Ages Estimated Using the Sulfur Hexafluoride Tracer Technique

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Engineering 2017年第5期3卷 753-759页

作者： Steven J. Morrisonn Judith McBride Alan W. Gordon Alastair R. G. Wylie Tianhai Yan Agri-Food and Biosciences Institute Hillsborough County Down BT26 6DR UK Agri-Food and Biosciences Institute Belfast BT9 5PX UK

Although the effect of animal and diet factors on enteric methane （CH4） emissions from confined cattle has been extensively examined, less data is available regarding CH4 emissions from grazing young cattle. A study was undertaken to evaluate the effect of the physiological state of Holstein-Friesian heifers on their enteric CH4 emissions while grazing a perennial ryegrass sward. Two experiments were conducted： Experiment 1 ran from May 2011 for 11 weeks and Experiment 2 ran from August 2011 for 10 weeks. In each experiment, Holstein-Friesian heifers were divided into three treatment groups （12 animals/group） consisting of calves, yearling heifers, and in-calf heifers （average ages： 8.5, 14.5, and 20.5 months, respectively）. methane emissions were estimated for each animal in the final week of each experiment using the sulfur hexafluoride tracer technique. Dry matter （DM） intake was estimated using the calculated metabolizable energy （ME） requirement divided by the ME concentration in the grazed grass. As expected, live weight increased with increasing animal age （P 〈 0.001）; however, there was no difference in live weight gain among the three groups in Experiment 1, although in Experiment 2, this variable decreased with increasing animal age （P 〈 0.001 ）. In Experiment 1, yearling heifers had the highest CH4 emissions （g·d^-1） and in-calf heifers produced more than calves （P 〈 0.001 ）. When expressed as CH4 emissions per unit of live weight, DM intake, and gross energy （GE） intake, yearling heifers had higher emission rates than calves and in-calf heifers （P 〈 0.001）. However, the effects on CH4 emissions were different in Experiment 2, in which CH, emissions （g·d^-1） increased linearly with increasing animal age （P 〈 0.001）, although the difference between yearling and in-calf heifers was not significant. The CH4/live weight ratio was lower in in-calf heifers than in the other two groups （P 〈 0.001 ）, while CH4 energy output as a proportion of GE intake was lower

关键词： methane emission Grazing dairy heifer Prediction Sulfur hexafluoride tracer technique

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Prediction of methane emissions during the extraction of close-to-roof layer of a seam of large thickness

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Journal of Coal Science & Engineering(China) 2012年第4期18卷 337-343页

作者： KRAUSE Eugeniusz QU Xian-chao Central Mining Institute Katowice 43-190Poland Mine Safety Technology Branch China Coal Research InstituteBeijing 100013China

Prediction of methane emissions at the stage of longwall planning constitutes the basis for the determination of the appropriate method and parameters of ventilation and selection of prevention means including the methane drainage technol- ogy. The growth of methane saturation of coal seams with the extraction depth, with simultaneously increasing output concen- tration, contributes to the increase of the quantity of methane emitted into longwall areas. The subject matter of the article has been directed at the predicted quantity of methane emissions into planned longwalls with roof caving in the layer of seams adjacent to the roof of large thickness. The performed prognostic calculations of methane emissions into the longwall working were referred to two sources, i.e. methane liberated during coal mining by means of a cutter-loader and methane originating from the degasification of the floor layer destressed by the longwall conducted in the close-to-roof layer. The calculations of predictions allow to refer to the planned longwall, on account of the emitting methane, with possible and safe output quantity. Planning of extraction in the close-to-roof layer of a seam of large thickness with roof caving is especially important in con- ditions of increasing methane saturation with the depth of deposition and should be preceded by a prognostic analysis for de- termining the extraction possibilities of the planned longwall.

关键词： methane emission extraction close-to-roof layer coal seam large thickness longwall prediction

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methane and Nitrous Oxide emissions from Rice-Duck and Rice-Fish Complex Ecosystems and the Evaluation of Their Economic Significance

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Agricultural Sciences in China 2009年第10期8卷 1246-1255页

作者： YUAN Wei-ling CAO Cou-gui LI Cheng-fang ZHAN Ming CAI Ming-li WANG Jin-ping Crop Physiology and Production Center （CPPC） Huazhong Agricultural University~Key Laboratory of Huazhong Crop PhysiologyEcology and Production Ministry of Agriculture Wuhan 430070 P.R China

Rice-duck （RD） and rice-fish （RF） ecological systems are major complex planting and breeding models of rice paddy fields in southern China. Studying the methane （CH4） and nitrous oxide （N2O） emissions and their economic value from these two ecosystems can provide theoretical and practical basis for further development and utilization of these classical agricultural techniques. CH4 and N2O emissions from RD and RF ecological systems were measured in situ by using static chambers technique. Using global warming potentials （GWPs）, we assessed the greenhouse effect of CH4 and N2O and their economic value. Results showed that the peaks of CH4 emission fluxes from RD and RF appeared at full tillering stage and at heading stage, and the average emission fluxes were significantly （P〈 0.05） lower than that from CK. N2O fluxes remained low when the field is flooded and high after draining the water. Compared with CK, the total amount of N2O emissions was significantly （P〈0.05） higher and slightly lower than those from RD and RF, respectively. In 2006 and 2007, the total greenhouse effect of CH4 and N20 from RD and RF were 4 728.3 and 4 611 kg CO2 ha^-1, 4 545 and 4 754.3 kg CO2 ha^-1, respectively. The costs of greenhouse effect were 970.89 and 946.81 RMB yuan ha^-1, and 933.25 and 976.23 RMB yuan ha^-1, respectively, which were significant lower than those from CK （5 997.6 and 5 391.5 RMB yuan ha^-1）. Except for the environment cost of CH4 and N2O, the economic benefits from RD and RF were 2 210.64 and 4 881.92 RMB yuan ha^-1; 3 798.37 and 5 310.64 RMB yuan ha^-1, respectively, higher than those from CK. Therefore, RD and RF complex ecological planting and breeding models can effectively decrease and control CH4 and N2O emissions, and they are two of the effective strategies to reduce greenhouse gases from rice paddy fields and contribute in alleviating global warming. Thus, their adoption is important to the environment together with their economy benefits.

关键词： methane emission nitrous oxide emission rice-duck complex ecosystem rice-fish complex ecosystem,greenhouse effect economic benefit

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The effect of ensiled paulownia leaves in a high-forage diet on ruminal fermentation,methane production,fatty acid composition,and milk production performance of dairy cows

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Journal of Animal Science and Biotechnology 2023年第1期14卷 339-357页

作者： Haihao Huang Dorota Lechniak Malgorzata Szumacher‑Strabel Amlan Kumar Patra Martyna Kozłowska Pawel Kolodziejski Min Gao Sylwester Ślusarczyk Daniel Petrič Adam Cieslak Department of Animal Nutrition PoznańUniversity of Life SciencesWołyńska 3360‑637 PoznańPoland. Department of Genetics and Animal Breeding PoznańUniversity of Life SciencesWolynska 33Poznań60‑637Poland. Department of Animal Nutrition West Bengal University of Animal and Fishery Sciences37 K.B.SaraniKolkataIndia. Institute of Genetics and Animal Biotechnology Polish Academy of SciencesPostępu 36A05‑552MagdalenkaWarsawPoland. Department of Animal Physiology Biochemistry and BiostructurePoznan University of Life SciencesWolynska 35Poznan 60‑637Poland. Department of Pharmaceutical Biology and Botanic Garden of Medicinal Plants Wrocław Medical UniversityWrocław 50‑556Poland. Institute of Animal Physiology Centre of Biosciences of Slovak Academy of SciencesŠoltesovej 4‑6040‑01 KošiceSlovak Republic. Department of Animal Nutrition Faculty of Veterinary Medicine and Animal SciencePoznańUniversity of Life SciencesPoznań60‑637Poland.

Background:The use of industrial by-products rich in bioactive compounds as animal feeds can reduce greenhouse gas *** leaves silage(PLS)was supplemented to dairy cows'diet and evaluated in vitro(Exp.1;Rusitec)and in vivo(Exp.2,cannulated lactating dairy cows and Exp.3,non-cannulated lactating dairy cows).The study investigated the PLS effect on ruminal fermentation,microbial populations,methane production and concentration,dry matter intake(DMI),and fatty acid(FA)proportions in ruminal fluid and ***:Several variables of the ruminal fluid were changed in response to the inclusion of *** Exp.1,the p H increased linearly and quadratically,whereas ammonia and total volatile fatty acid(VFA)concentrations increased linearly and cubically.A linear,quadratic,and cubical decrease in methane concentration was observed with increasing dose of the ***.2 revealed an increase in ruminal p H and ammonia concentrations,but no changes in total VFA *** of PLS increased ruminal propionate(at 3 h and 6 h after feeding),isovalerate,and valerate *** of PLS also affected several populations of the analyzed *** abundances of protozoa and bacteria were increased,whereas the abundance of archaea were decreased by *** production decreased by 11%and 14%in PLS-fed cows compared to the control in Exp.2 and 3,***.3 revealed a reduction in the milk protein and lactose yield in the PLS-fed cows,but no effect on DMI and energy corrected milk ***,the PLS diet affected the ruminal biohydrogenation process with an increased proportions of C18:3 cis-9 cis-12 cis-15,conjugated linoleic acid,C18:1 trans-11 FA,polyunsaturated fatty acids(PUFA),and reduced n6/n3 ratio and saturated fatty acids(SFA)proportion in *** relative transcript abundances of the 5 of 6 analyzed genes regulating FA metabolism ***:The dietary PLS replacing the alfalfa silage at 60 g/kg diet can red

关键词： Dairy cow Fatty acid composition in milk methane emission Paulownia leaves

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Potential use of garlic products in ruminant feeding:A review

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Animal Nutrition 2023年第3期14卷 343-355页

作者： He Ding Changjin Ao Xiaoqing Zhang Institute of Grassland Research Chinese Academy of Agricultural SciencesHohhot 010010China Key Laboratory of Animal Feed and Nutrition of Inner Mongolia Autonomous Region College of Animal ScienceInner Mongolia Agricultural UniversityHohhot 010018China

The addition of antibiotics as growth promoters to ruminant feed can result in bacterial resistance and antibiotic residues in ruminant ***,there is serious public concern regarding the presence of antibiotic residue in ruminant products and the consequent threat to human *** a result,the addition of plants and their products to ruminant feeds,as an alternative to antibiotics,has received much attention *** and its products are rich in organosulphur compounds,which have a variety of biological activities and have been widely used as natural additives in animal *** review presents recent knowledge on the addition of garlic products(powder,skin,oil,leaf and extracts)to the diets of *** this paper,garlic products are evaluated with respect to their chemical composition,bioactive compounds,and their impacts on the rumen ecosystem,antioxidant status,immune response,parasitic infection,growth performance and product quality of *** review provides valuable guidance and a theoretical basis for the development of garlic products as green,highly efficient and safe additives,with the aims of promoting ruminant growth and health,reducing methane emissions and improving ruminant product *** extracts have the potential to control parasite infections by decreasing the faecal egg *** powder,oil and allicin are able to reduce the methane emissions of *** compounds such as allicin,which is present in garlic products,have the potential to inhibit membrane lipid synthesis of the archaeal community,thus influencing the population of methanogenic archaea and resulting in a reduction in methane *** garlic products are also able to increase the average daily gain(garlic skin,water extract,and leaf)and the feed conversion ratio(garlic skin and leaf)of *** stalk silage fed to sheep has the potential to improve the nutritional value of mutton by increasing the

关键词： Garlic product Ruminant methane emission Growth performance Product quality

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Dynamics of the ruminal microbial ecosystem, and inhibition of methanogenesis and propiogenesis in response to nitrate feeding to Holstein calves

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Animal Nutrition 2021年第4期7卷 1205-1218页

作者： Abimael Ortiz-Chura Jose Gere Gisela Marcoppido Gustavo Depetris Silvio Cravero Claudia Faverin Cesar Pinares-Patino Angel Cataldi d Maria E.Ceron-Cucchi Institute of Pathobiology CICVyA National Institute of Agricultural TechnologyIPVetUEDD INTA-CONICETHurlinghamC1686Argentina Engineering Research and Development Division National Technological University(UTN)National Scientific and Technical Research Council(CONICET)Buenos AiresC1179Argentina Agricultural Experimental Station of Balcarce National Institute of Agricultural Technology(INTA)BalcarceB7620Argentina Institute of Agrobiotechnology and Molecular Biology IABIMONational Institute of Agricultural Technology(INTA)National Scientific and Technical Research Council(CONICET)HurlinghamC1686Argentina The Agribusiness Group Lincoln UniversityPO Box 85016Lincoln7674New Zealand

It is known that nitrate inhibits ruminal methanogenesis,mainly through competition with hydrogenotrophic methanogens for available hydrogen(H2)and also through toxic effects on the ***,there is limited knowledge about its effects on the others members of ruminal microbiota and their *** this study,we investigated the effects of dietary nitrate inclusion on enteric methane(CH4)emission,temporal changes in ruminal microbiota,and fermentation in Holstein *** animals were maintained in individual pens for 45 *** were randomly allocated to either a control(CTR)or nitrate(NIT,containing 15 g of calcium nitrate/kg dry matter)*** emissions were estimated using the sulfur hexafluoride(SF6)tracer *** microbiota changes and ruminal fermentation were evaluated at 0,4,and 8 h *** this study,feed dry matter intake(DMI)did not differ between dietary treatments(P>0.05).Diets containing NIT reduced CH4 emissions by 27%(g/d)and yield by 21%(g/kg DMI)compared to the CTR(P0.05)but differed with time,and post-feeding(Pemissions and the methanogens population,whereas it decreases the propionate concentration and the abundance of bacteria involved in the succinate and acrylate pathways.D

关键词： methane emission Nitrate Microbiota Ruminal fermentation

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Estimate of CH_4 emissions from Year-Round Flooded Rice Fields During Rice Growing Season in China

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Pedosphere 2005年第1期15卷 66-71页

作者： CAIZu-Cong KANGGuo-Ding H.TSURUTA A.MOSIER StateKeyLaboratoryofSoilandSustainableAgriculture InstituteofSoilScienceChineseAcademyofSciencesNanjing210008China DepartmentofDemographyandEconomics NanjingCollegeforPopulationProgramManagementNanjing210093China TokyoUniversityofAgricultureandTechnology TokyoJapan USDA／ARS Ft.CollinsCO80522USA

A special kind of rice field exists in China that is flooded year-round. These rice fields have substantially large CH4 emissions during the rice-growing season and emit CH4 continuously in the non-rice growing season. CH4 emission factors were used to estimate the CH4 emissions from year-round flooded rice fields during the rice-growing season in China. The CH4 emissions for the year-round flooded rice fields in China for the rice growing season over a total area of 2.66 Mha were estimated to be 2.44 Tg CH…

关键词： IPCC methodology methane emission rice fields year-round flooded

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Growth performance and rumen microorganism differ between segregated weaning lambs and grazing lambs

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Journal of Integrative Agriculture 2016年第4期15卷 872-878页

作者： JI Shou-kun JIANG Cheng-gang LI Rui DIAO Qi-yu TU Yan ZHANG Nai-feng SI Bing-wen Feed Research Institute Chinese Academy of Agricultural Sciences Jinfeng Animal Husbandry Group Co. Ltd.

Two feeding patterns of the segregated weaning or grazing in the pasture are carried out worldwide in animal production. To investigate the difference of growth performance and rumen microorganism population related to methane metabolism in the two feeding patterns, three groups of lambs （70 in total） were used： Weaning at 21 days old and being subjected to high-concentration diets （3WK group with 20 lambs）, weaning at 35 days old and being subjected to high-concentration diets （5WK group with 20 lambs）, or grazing at pasture with the nursing mother （Grazing group with 30 lambs）. The growth performance, pH value of rumen content, and the rumen microbes were investigated during weaning period and fattening period with approximately 3 months. Our results showed that lambs in 3WK and 5WK groups demonstrated a better growth performance than the lambs in Grazing group, but no significant difference was observed in the pH value between the three groups （P〉0.05）. The total rumen bacterial population of the Grazing lambs was significantly lower than that of 3WK lambs （P〈0.05） and 5WK lambs （P〈0.05）; however, the population of methanogens was 4.2- and 2.7-fold lower in the 3WK （P〈0.05） and 5WK （P〈0.05） lambs compared with Grazing lambs, respectively; protozoa were also 3.5- and 3.4-fold lower in the 3WK （P〈0.05） and 5WK （P〈0.05） lambs, respectively. The results revealed that segregated weaning lambs may have better growth performance, and reduce methane-producing microbes.

关键词： weaning grazing growth performance microorganism methane emission

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