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Assessing the response of dryland barley yield to climate variability in semi-arid regions,Iran

Journal of Arid Land 2021年第9期13卷 905-917页

作者： Mohammad KHEIRI Jafar KAMBOUZIA Reza DEIHIMFARD Saghi M MOGHADDAM Seyran ANVARI Department of Agroecology Environmental Sciences Research InstituteShahid Beheshti UniversityTehran ***Iran Faculty of Environmental Sciences Czech University of Life Sciences PraguePrague 16500Czech Republic

Precipitation and temperature are the most abiotic factors that greatly impact the yield of crop,particularly in ***,as the main cereal is predominantly cultivated in dryland and the livelihood of smallholders depends on the production of this crop,particularly in arid and semi-arid *** study aimed to investigate the response of the grain yield of dryland barley to temperature and precipitation variations at annual,seasonal and monthly scales in seven counties of East and West Azerbaijan provinces in northwestern Iran during *** index(HI)was calculated and its relationship with dryland barley yield was evaluated at annual and monthly *** results showed that the minimum,maximum and mean temperatures increased by 0.19℃/a,0.11℃/a and 0.10℃/a,respectively,while annual precipitation decreased by 0.80 mm/a during *** in study area has become drier by 0.22/a in annual HI during the study *** effects of increasing temperature on the grain yield of dryland barley were more severe than the positive effects of increasing ***,weather variations in April and May were related more to the grain yield of dryland barley than those in other *** grain yield of dryland barley was more drastically affected by the variation of annual minimum temperature comparing with other weather ***,our findings illustrated that the grain yield of dryland barley increased by 0.01 t/hm^(2) for each unit increase in annual HI during ***,any increase in the monthly HI led to crop yield improvement in the study area,particularly in the drier counties,i.e.,Myaneh,Tabriz and Khoy in Iran.

关键词： humidity index crop yield spatiotemporal variation temperature precipitation

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Liming reduces soil phosphorus availability but promotes yield and P uptake in a double rice cropping system

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Journal of Integrative Agriculture 2020年第11期19卷 2807-2814页

作者： LIAO Ping Mart BHROS Natasja VAN GESTEL SUN Yan-ni ZHANG Jun HUANG Shan ZENG Yong-jun WU Zi-ming Kees Jan VAN GROENIGEN Key Laboratory of crop Physiology Ecology and Genetic BreedingMinistry of Education/Jiangxi Agricultural UniversityNanchang 330045P.R.China Wageningen Environmental Research Wageningen University&ResearchWageningen 6700 AAthe Netherlands Department of Biological Sciences Texas Tech UniversityLubbockTX 79409USA Institute of crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Department of Geography College of Life and Environmental SciencesUniversity of ExeterExeter EX44 RJUK

Liming is often applied to alleviate soil acidification and increase crop yield on acidic soils,but its effect on soil phosphorus(P)availability is unclear,particularly in rice *** objective of this study was to examine the effect of liming on rice production,yield and P uptake in a three-year field experiment in a double rice cropping system in subtropical *** also conducted an incubation experiment to investigate the direct effect of liming on soil available P and phosphatase activities on paddy soils in the absence of *** the incubation experiment,liming reduced soil P availability(measured as Olsenextractable P)by 14–17%and inhibited the activity of soil acid ***,lime application increased grain yield,biomass,and P uptake in the *** increased grain yield and P uptake more strongly for late rice(26 and 21%,respectively)than for early rice(15 and 8%,respectively).Liming reduced the concentration of soil available P in the field as well,reflecting the increase in rice P uptake and the direct negative effect of liming on soil P *** together,these results suggest that by stimulating rice growth,liming can overcome direct negative effects on soil P availability and increase plant P uptake in this acidic paddy soil where P is not the limiting factor.

关键词： crop yield subtropical phosphatase activity phosphorus availability soil acidification

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Climate Change Modelling and Its Roles to Chinese crops yield

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Journal of Integrative Agriculture 2013年第5期12卷 892-902页

作者： JU Hui LIN Er-da Tim Wheeler Andrew Challinor JIANG Shuai Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Key Laboratory of Agro-Environment & Climate Change Ministry of Agriculture Walker Institute for Climate System Research Department of AgricultureUniversity of Reading Institute for Climate and Atmospheric Science School of Earth and EnvironmentThe University of Leeds

Climate has been changing in the last fifty years in China and will continue to change regardless any efforts for mitigation. Agriculture is a climate-dependent activity and highly sensitive to climate changes and climate variability. Understanding the interactions between climate change and agricultural production is essential for society stable development of China. The first mission is to fully understand how to predict future climate and link it with agriculture production system. In this paper, recent studies both domestic and international are reviewed in order to provide an overall image of the progress in climate change researches. The methods for climate change scenarios construction are introduced. The pivotal techniques linking crop model and climate models are systematically assessed and climate change impacts on Chinese crops yield among model results are summarized. The study found that simulated productions of grain crop inherit uncertainty from using different climate models, emission scenarios and the crops simulation models. Moreover, studies have different spatial resolutions, and methods for general circulation model （GCM） downscaling which increase the uncertainty for regional impacts assessment. However, the magnitude of change in crop production due to climate change （at 700 ppm CO2 eq correct） appears within ±10% for China in these assessments. In most literatures, the three cereal crop yields showed decline under climate change scenarios and only wheat in some region showed increase. Finally, the paper points out several gaps in current researches which need more studies to shorten the distance for objective recognizing the impacts of climate change on crops. The uncertainty for crop yield projection is associated with climate change scenarios, CO2 fertilization effects and adaptation options. Therefore, more studies on the fields such as free air CO2 enrichment experiment and practical adaptations implemented need to be carried out.

关键词： climate change modelling crop yield impacts China

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A Cotton BURP Domain Protein Interacts With α-Expansin and Their Co-Expression Promotes Plant Growth and Fruit Production

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Molecular Plant 2013年第3期6卷 945-958页

作者： Bing Xu Jin-Ying Gou Fu-Guang Li Xiao-Xia Shangguan Bo Zhao Chang-Qing Yang Ling-Jian Wang Sheng Yuan Chang-Jun Liu Xiao-Ya-Chen National Key Laboratory of Plant Molecular Genetics and National Plant Gene Research Center Institute of Plant Physiology and Ecology Shangha Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China Department of Biology Brookhaven National Laboratory Upton NY 11973 USA National Key Laboratory of Cotton Biology Institute of Cotton Research Chinese Academy of Agriculture Sciences Anyang 455000 China Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life Science Nanjing Normal University Nanjing 210046 China

Plant growth requires cell wall extension. The cotton AtRD22-Like I gene GhRDL1, predominately expressed in elongating fiber cells, encodes a BURP domain-containing protein. Here, we show that GhRDL1 is localized in cell wall and interacts with GhEXPA1, an α-expansin functioning in wall loosening. Transgenic cotton overexpressing GhRDL1 showed an increase in fiber length and seed mass, and an enlargement of endopleura cells of ovules. Expression of either GhRDL1 or GhEXPA1 alone in Arabidopsis led to a substantial increase in seed size; interestingly, their co-expression resulted in the increased number of siliques, the nearly doubled seed mass, and the enhanced biomass production. Cotton plants overexpressing GhRDL1 and GhEXPA1 proteins produced strikingly more fruits （bolls）, leading to up to 40% higher fiber yield per plant without adverse effects on fiber quality and vegetative growth. We demonstrate that engineering cell wall protein partners has a great potential in promoting plant growth and crop yield.

关键词： BURP protein RD22-1ike α-expansin cell wall crop yield fruiting cotton fiber biomass.

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Long-term phosphorus accumulation and agronomic and environmtal critical phosphorus levels in Haplic Luvisol soil, northern China

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Journal of Integrative Agriculture 2016年第1期15卷 200-208页

作者： XI Bin ZHAI Li-mei LIU Jian LIU Shen WANG Hong-yuan LUO Chun-yan REN Tian-zhi LIU Hong-bin Key Laboratory of Nonpoint Source Pollution Control Ministry of AgricultureInstitute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences USDA-Agricultural Research Service Pasture Systems and Watershed Management Research Unit Institute of Agro-Environmental Protection Ministry of Agriculture

Sufficient soil phosphorus （P） content is essential for achieving optimal crop yields, but accumulation of P in the soil due to excessive P applications can cause a risk of P loss and contribute to eutrophication of surface waters. Determination of a critical soil P value is fundamental for making appropriate P fertilization recommendations to ensure safety of both environment and crop production. In this study, agronomic and environmental critical P levels were determined by using linear-linear and linear-plateau models, and two segment linear model, for a maize （Zea mays L.）-winter wheat （Triticum aestivum L.） rotation system based on a 22-yr field experiment on a Haplic Luvisol soil in northern China. This study included six treatments： control （unfertilized）, no P （NoP）, application of mineral P fertilizer （MinP）, MinP plus return of maize straw （MinP＋StrP）, MinP plus low rate of farmyard swine manure （MinP＋***） and MinP plus high rate of manure （MinP＋ ***）. Based on the two models, the mean agronomic critical levels of soil Olsen-P for optimal maize and wheat yields were 12.3 and 12.8 mg kg-1, respectively. The environmental critical P value as an indicator for P leaching was 30.6 mg Olsen-P kg-1, which was 2.4 times higher than the agronomic critical P value （on average 12.5 mg P kg-1）. It was calculated that soil OIsen-P content would reach the environmental critical P value in 41 years in the MinP treatment, but in only 5-6 years in the two manure treatments. Application of manure could significantly raise soil Olsen-P content and cause an obvious risk of P leaching. In conclusion, the threshold range of soil Olsen-P is from 12.5 to 30.6 mg P kg-1 to optimize crop yields and meanwhile maintain relatively low risk of P leaching in Haplic Luvisol soil, northern China.

关键词： critical phosphorus value crop yield Olsen P phosphorus leaching soil phosphorus test water quality

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Influence of Straw Incorporation on Maize yield,N Accumulation and Remobilization on Slope Farmland in Northeast China

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Journal of Northeast Agricultural University(English Edition) 2023年第2期30卷 55-67页

作者： Dai Jian-jun Liu Hong-fei Li Hang Liu Zhao-ting Wu Hai-feng College of Resources and Environment Northeast Agricultural UniversityHarbin 150030China

Slope farmland is a main type of agricultural land throughout northeast ***-term high intensity utilization and unreasonable farming have caused the deterioration of soil resources and a decrease in crop ***,it was hypothesized that crop straw incorporation might help to reduce nutrient losses and increase maize yields across time and space.A field experiment for testing straw management practices on maize across three slope positions(top,back and bottom slopes)was conducted in Northeast China in 2018 and *** this study,the dry matter accumulation(DMA),N accumulation(NA),N remobilization,postsilking N uptake and grain yield were measured under SI(straw incorporation)and NSI(no straw incorporation)across three slope positions of 100-m-long consecutive black soil slope farmland during the maize(Zea mays L.)growth *** with NSI,SI significantly increased DMA and NA at the silking and maturity *** typically increased the N remobilization in all slope positions,and significantly increased N remobilization efficiency and contribution of N remobilization to grain on the back and bottom ***,post-silking N uptake was only increased by SI on the top *** generally increased the crop yield in three slope *** the SI treatments,the bottom slope was the highest yield position,followed by the top,and then the back slopes,suggesting that the bottom slope position of regularly incorporated straw might have increased the potential for boosting maize ***,the study demonstrated the outsized potential of straw incorporation to enhance maize NA and then increase the grain yield in black soil slope farmland.

关键词： dry matter N accumulation N remobilization crop yield black soil slope farmland maize

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Evaluation of irrigation water salinity and leaching fraction on the water productivity for crops

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International Journal of Agricultural and Biological Engineering 2020年第1期13卷 170-177页

作者： Songrui Ning Beibei Zhou Quanjiu Wang Wanghai Tao State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China Xi’an University of TechnologyXi’an 710048China

In arid and semi-arid irrigated croplands,the excessive accumulation of soluble salts in the root zone is an extensive problem that seriously limits crop yield and water productivity(WP).To avoid affects the yield potential of crops,the application of extra irrigation for leaching of excessive salts from the root zone was *** knowledge of effects of the irrigation water salinity and leaching fraction(LF)on the relative yield(RY)and the unit water productivity of crop evapotranspiration(UWPET)and the unit water productivity of irrigation water(UWPI)were becoming gradually *** article provided theoretical models for estimating the UWPs(UWPET and UWPI)and optimizing leaching fraction according to irrigation water *** the present study,eight levels of irrigation water salinity(ECw=0.25,0.50,0.75,1,2,3,4,and 5 dS/m)and 39 levels of LF values ranging from 0.04 to 0.80 were set and tested to assessing their effects on the RY and UWPs for four typical crops(barley,bean,wheat,and maize)with different salt tolerance *** every curve determined between the UWPs and LFs for the four crops had an inflection *** was indicated that the UWPET and UWPI could be maximized by optimizing the LF under different irrigation water ***,the linear regression relationships were established to estimate the maximum values of UWPs and their corresponding optimal LFs for four crops by using the irrigation water ***,the theoretical models for estimating the UWPs were validated by data of wheat from previous literature,and the models could be suitable with acceptable relative errors when LFs ranging from 0.07 to 0.17.

关键词： irrigation water salinity leaching fraction salt-tolerant crop salt stress crop yield water productivity

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Review on advances of airjection irrigation

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International Journal of Agricultural and Biological Engineering 2016年第2期9卷 1-10页

作者： Li Yuan Niu Wenquan Wang Jingwei Xu Jian Zhang Mingzhi Li Kangyong Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Soil and Water Conservation Chinese Academy of Sciences&Ministry of Water ResourcesYangling 712100ShaanxiChina College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100ShaanxiChina Institute of Water-saving Agriculture in Arid Areas of China(IWSA) Northwest A&F UniversityYangling 712100ShaanxiChina

Air is squeezed out of the soil in the process of traditional *** stress of the root zone is harmful to the yield and quality of *** was found that the improvement of the soil oxygen condition can increase the crop yield and quality in the root *** recent years,a number of studies showed that hypoxia stress has bad influence on root zone,and the ventilation technologies have some positive effects on crop yield and *** paper introduces and analyzes the mechanism of hypoxia stress in root zone,and provides an overview about characteristics and application on airjection ***,the advantages and disadvantages of different airjection irrigation technologies were investigated,the achievements that have been made in this filed were summarized,and some existed problems were *** on the previous studies,the research trends of the airjection irrigation technology were proposed,which can provide a reference for the further research in the research field.

关键词： irrigation airjection root zone hypoxia stress crop yield

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Potential fly-ash utilization in agriculture:A global review

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Progress in Natural Science:Materials International 2009年第10期19卷 1173-1186页

作者： Manisha Basu Manish Pande P.B.S.Bhadoria S.C.Mahapatra Agriculture & Food Services SGS India Pvt. Ltd. Department of Agricultural and Food Engineering Indian Institute of Technology Rural Development Centre Indian Institute of Technology

Though in last four decades various alternate energy sources have come into the limelight, the hyperbolic use of coal as a prime energy source cannot be counterbalanced. Disposal of high amount of fly-ash from thermal power plants absorbs huge amount of water, energy and land area by ash ponds. In order to meet the growing energy demand, various environmental, economic and social problems associated with the disposal of fly-ash would continue to increase. Therefore, fly-ash management would remain a great concern of the century. Fly-ash has great potentiality in agriculture due to its efficacy in modification of soil health and crop performance. The high concentration of elements (K, Na, Zn, Ca, Mg and Fe) in fly-ash increases the yield of many agricultural crops. But compared to other sectors, the use of fly-ash in agriculture is limited. An exhaustive review of numerous studies of last four decades took place in this paper, which systematically covers the importance, scope and apprehension regarding utilization of fly-ash in agriculture. The authors concluded that though studies have established some solutions to handle the problems of radioactivity and heavy metal content in fly-ash, long-term confirmatory research and demonstration are necessary. This paper also identified some areas, like proper handling of dry ash in plants as well as in fields, ash pond management (i.e., faster decantation, recycling of water, vertical expansion rather than horizontal), monitoring of soil health, crop quality, and fate of fly-ash in time domain, where research thrust is required. Agricultural lime application contributes to global warming as Intergovernmental Panel on Climate Change (IPCC) assumes that all the carbon in agricultural lime is finally released as CO2 to the atmosphere. It is expected that use of fly-ash instead of lime in agriculture can reduce net CO2 emission, thus reduce global warming also.

关键词： Coal fly-ash Agriculture Soil health crop yield Radioactivity Global warming

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Much Improved Irrigation Use Efficiency in an Intensive Wheat-Maize Double cropping System in the North China Plain

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Journal of Integrative Plant Biology 2007年第10期49卷 1517-1526页

作者： Quanxiao Fang Yuhai Chen Qiang Yu Zhu Ouyang Quanqi Li Shunzhang Yu Agronomy College Qingdao Agricultural University Qingdao China266109 Institute of Geographical Sciences and Natural Resources Research The Chinese Academy of Sciences Beijing China100101 Agronomy College Shandong Agricultural University Taian China271018

crop yield and water use efficiency （WUE） in a wheat-maize double cropping system are influenced by short and uneven rainfalls in the North China Plain （NCP）, A 2-year experiment was conducted to investigate the effects of irrigation on soil water balance, crop yield and WUE to improve irrigation use efficiency in the cropping system, Soil water depletion （~SWS） by crop generally decreased with the increase of irrigation and rainfall, while ASWS for the whole rotation was relatively stable among these irrigation treatments, High irrigations in wheat season increased initial soil moisture and ASWS for subsequent maize especially in the drought season, Initial soil water influenced mainly by the irrigation and rainfall in the previous crop season, is essential to high yield in such cropping systems, Grain yield decreased prior to evapotranspiraUon （ET） when ET reached about 300mm for wheat, while maize showed various WUEs with similar seasonal ET, For whole rotation, WUE declined when ET exceeded about 650 mm, These results indicate great potential for improving irrigation use efficiency in such wheat-maize cropping system in the NCP, Based on the present results, reasonable irrigation schedules according to different annual rainfall conditions are presented for such a cropping system.

关键词： cropping system crop yield irrigation schedule North China Plain soil water balance water use efficiency.

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