检索结果-南通市图书馆

草业学报 2005年第1期14卷 117-125页

作者： Ronald E Sosebee David B Wester j Carlos Villalobos Carlton M Britton Changgui Wan Hisham Nofal Department of Range Wildlife&Fisheries ManagementTexas Tech UniversityLubbockTexas 79409

适当管理饲料饲草资源的基本原则是理解多年生牧草如何生长。长期以来 ,对根系生长有了基本的了解 ,对去叶和环境对根系生长的影响也知之甚多。然而 ,对去叶、干旱及其他环境因素对多年生牧草的影响以及这些牧草对去叶的反应缺乏应有的... 详细信息

适当管理饲料饲草资源的基本原则是理解多年生牧草如何生长。长期以来 ,对根系生长有了基本的了解 ,对去叶和环境对根系生长的影响也知之甚多。然而 ,对去叶、干旱及其他环境因素对多年生牧草的影响以及这些牧草对去叶的反应缺乏应有的理解。从牧草返青到开花 ,植物处于短枝阶段 ,适度放牧并不对多年生牧草的健康和活力造成危害 ,因为植物会弥补其失去的叶片。然而 ,当牧草从短枝向长枝阶段 (节间伸长和开花期 )转移时 ,碳水化合物主要用于节间伸长和开花过程。在开花后和休眠前期 ,碳水化合物主要向茎基和植物基部转移 ,以供来年新枝条的发育。因此 ,在花后和休眠前期 ,放牧系统必须被调节到“无放牧”状态。“无放牧”状态 ,如休息、轮牧、延迟轮牧和快速轮牧制 ,其价值在于这种定期的禁牧可提高多年生牧草的活力 ,改善草地的健康状况 ,并且在不利的环境条件下。

关键词：长枝短枝放牧去叶碳水化合物

Diversity of Insect flower Visitors on Macadamia within a Monoculture Orchard in Murang’a County, Central Kenya

在线全文

学校读者我要写书评

暂无评论

Advances in Entomology 2023年第4期11卷 239-255页

作者： Nicholas I. Njue james W. Muthomi George N. Chemining’wa john H. Nderitu josiah Achieng james j. Odanga Department of Plant Science and Crop Protection University of Nairobi Nairobi Kenya Invertebrate Zoology Section National Museums of Kenya Nairobi Kenya

Macadamia is cultivated for its nutritious edible kernel. In Kenya, the crop is predominantly grown by smallholder farmers mainly for export markets. Macadamia trees also enhance agro-forestry conservation, in the East African farmlands, by providing habitat and floral resources to beneficial arthropods such as insect pollinators. Allogamy of macadamia flowers is largely dependent on insects that pollinate and consequently influence the nut set, retention and yield. However, there is limited information on macadamia insect flower visitors in Kenya. This article assessed the diversity of insects that forage flowers of macadamia crop, and further evaluated their temporal distribution, in Murang’a county, central Kenya. Insect flower visitors were sampled weekly using a butterfly net for twelve consecutive months, from january 2021 to December 2021. Sixty-one insect species were recorded foraging macadamia flowers in Murang’a county, central Kenya. There was a statistical difference in the Simpson diversity index among weather seasons, dry, long rain, cold and short rain (p Apis mellifera), a key pollinator species, being the most abundant flower visitor. This study provides strong baseline information, to scientists and farmers, on probable macadamia pollinator species, in central Kenya. .

关键词： Macadamia flowers Insect Diversity Kenya

Influence of Adjuvants on the Efficacy of Tolpyralate plus Atrazine for the Control of Annual Grass and Broadleaf Weeds in Corn with and without Roundup WeatherMAX<sup>®</sup>

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American journal of Plant Sciences 2020年第3期11卷 465-495页

作者： Nicole M. Langdon Nader Soltani Alan j. Raedar Darren E. Robinson David C. Hooker Peter H. Sikkema University of Guelph Ridgetown Campus Ridgetown Canada ISK Biosciences Inc. Concord OH USA

Tolpyralate is a new HPPD-inhibiting herbicide that is efficacious on annual grass and broadleaf weed species in corn. For maximum herbicide performance of tolpyralate, it is recommended that atrazine is tank mixed with tolpyralate along with the adjuvants methylated seed oil concentrate (MSO) plus urea ammonia nitrate (UAN). A common use pattern of tolpyralate plus atrazine will be in a tank mix with Roundup WeatherMAX®due to the high proportion of corn acres that are seeded to Roundup Ready®hybrids in Eastern Canada. There is no information in the peer-reviewed literature if the adjuvant system in Roundup WeatherMAX®is adequate for optimal herbicide performance of tolpyralate plus atrazine, or if MSO and UAN are still required. Six field trials were conducted over two years near Ridgetown and Exeter, ON, Canada to determine if adjuvants are still required when tolpyralate plus atrazine is tank mixed with Roundup WeatherMAX®in corn. Tolpyralate plus atrazine plus MSO and Roundup WeatherMAX®plus tolpyralate plus atrazine provided excellent control of velvetleaf, pigweed spp, common ragweed, lambsquarters, ladysthumb, wild mustard, flower-of-an-hour, barnyardgrass and green foxtail in this study. Results of this study show that in the absence of Roundup WeatherMAX®, weed control with tolpyralate plus atrazine was improved substantially with the addition of MSO;however, there was little to no increase in weed control with the addition of UAN. When tolpyralate plus atrazine was co-applied with Roundup WeatherMAX®, there was no improvement in weed control with the addition of MSO and/or UAN.

关键词： Biomass Broadleaf Weeds Corn Efficacy Grassweeds Roundup WeatherMAX Methylated Seed Oil Urea Ammonia Nitrate Weed Control Yield Zea mays L

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

叶蝉科四新种(同翅目:叶蝉总科)

林业科学 1998年第6期34卷 55-62页

作者：蔡平陆庆光浙江农业大学植保系中国农科院生防研究所

本文记述采自我国西北地区以及土库曼斯坦叶蝉科昆虫４新种：葛氏片角叶蝉ＩｄｉｏｃｅｒｕｓｋｕｏｈｉＣａｉ，新疆环茎叶蝉ＣｉｒｃｕｌｉｆｅｒｘｉｎｊｉａｎｇｅｎｓｉｓＣａｉ，柽柳大片叶蝉Ｍｅｇａｌｏｐｓｉｕｓｔａｍａｒ... 详细信息

本文记述采自我国西北地区以及土库曼斯坦叶蝉科昆虫４新种：葛氏片角叶蝉ＩｄｉｏｃｅｒｕｓｋｕｏｈｉＣａｉ，新疆环茎叶蝉ＣｉｒｃｕｌｉｆｅｒｘｉｎｊｉａｎｇｅｎｓｉｓＣａｉ，柽柳大片叶蝉ＭｅｇａｌｏｐｓｉｕｓｔａｍａｒｉｃｉｕｓＣａｉ，褐尾柽柳叶蝉ＴａｍａｒｉｃｅｌａｆｕｓｃｕｌａＣａｉ，该４新种分别采自柽柳属植物、沙枣和盐生草上，它们以刺吸汁液的方式为害以上植物。模式标本保存在安徽农业大学昆虫标本室。

关键词：同翅目叶蝉科新种柽柳

Activity of the Lenglongling fault system and seismotectonics of the 2016 MS6.4 Menyuan earthquake

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2017年第5期60卷 929-942页

作者： GUO Peng HAN Zhujun AN YanFen jIANG WenLiang MAO ZeBin FENG Wei Key Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing 100029 China Key Laboratory of Crustal Dynamics Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China China University of Geosciences School of Earth Sciences and Resources Beijing 100083 China Institute of Earthquake Science China Earthquake Administration Beijing 100036 China China Earthquake Networks Center Beijing 100045 China

The MS6.4 Menyuan earthquake occurred on the northern side of the Lenglongling fault(LLLF) in the mid-western of the Qilian-Haiyuan fault zone on january 21, 2016. The earthquake epicenter was distant from the Minle-Damaying and Huangcheng-Shuangta faults, eastern of the Northern Qilian Shan fault zone. A near northwest-striking rupture plane intersects the two faults at a certain angle. The focal mechanism solution shows that this was a thrust-type earthquake, slightly different from the strike-slip movement with a thrust component of the LLLF. Field geological mapping, tectonic geomorphology analysis, trench excavation and 14 C dating reveal that(1) the LLLF has been obviously active since the Holocene, and may behave with characteristic slip behavior and produce M_W7.3–7.5 earthquakes;(2) the LLLF appears as a flower structure in terms of structure style, and dips NNE at a steep angle; and(3) the most recent earthquake event occurred after 1815–1065 a BP. An associated fault, the Northern Lenglongling fault(NLLLF), is located at the northwestern end of the LLLF. Consequently, the NLLLF was continually subject to tectonic pushing effects from the left-lateral shear at the end of the LLLF, and, accordingly, it bent and rotated outward ***, the fault deviated from the dominant rupture azimuth and activity weakened. In the late Quaternary, it behaved as a thrust fault with no obvious deformation at the surface. This is indicated by the arc shape, with a micro-protrusion northeastward,and no geologic or geomorphic signs of surface rupturing since the late Quaternary. However, such faults could still rupture at depth, producing moderate-strong earthquakes. The geometric and kinematic properties of the NLLLF are in good agreement with the occurrence and kinematic properties of nodal plane 2, and with the distribution characteristics of the aftershocks and seismic intensity. Therefore, the NLLLF is a more suitable seismogenic structure for the MS 6.

关键词： MS6 4 Mengyuan earthquake Seismogenic structure Tectonic environment Lenglongling fault Northern Lenglongling fault

Biological Control of Insect Pests of Agricultural Crops through Habitat Management Was Discussed

在线全文

学校读者我要写书评

暂无评论

journal of Agricultural Chemistry and Environment 2019年第1期8卷 1-13页

作者： M. S. Akter S. S. Siddique R. Momotaz M. Arifunnahar K. M. Alam S. j. Mohiuddin Plant Breeding Division Bangladesh Agricultural Research Institute Dhaka Bangladesh

Biological control through habitat management leads to sustainable insect pest control. Different types of land composition such as multiple landscapes, patchiness of landscapes enhance the natural enemies which ultimately lead to control of insect pest. Plant characteristics such as flower shape, flower color and blooming period ensures excess food for natural enemies like nectar and pollen. Moreover, some agricultural practices such as tillage, crop rotation, and intercropping influence the natural enemies especially parasitoid and preda-tors. Consequently, they increase longevity and fecundity of parasitoid and predator that help to control insect pest. One of the most important recently used methods is push-pull which consists of semiochemicals called Herbi-vore-Induced Plant Volatiles (HIPVs). This compound has been used to pre-vent pest and attract natural enemies.

关键词： Biological Control Insect Pests Habitat Management

Unraveling the role of Ti3C2 MXene underlayer for enhanced photoelectrochemical water oxidation of hematite photoanodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Energy Chemistry 2021年第7期30卷 147-154,I0005页

作者： Haiyan ji Shan Shao Guotao Yuan Cheng Lu Kun Feng Yujian Xia Xiaoxin Lv jun Zhong Hui Xu jiujun Deng School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123JiangsuChina Automotive Engineering Research Institute Jiangsu UniversityZhenjiang 212013JiangsuChina

Hematite is regarded as a promising photoanode for photoelectrochemical(PEC) water ***,the charge recombination occurred at the interface of FTO/hematite strictly limits the PEC performance of ***,we reported a Ti3C2 MXene underlayer modified hematite(Ti-Fe2O3) photoanode via a simple drop-casting followed by hydrothermal and annealing *** to the bifunctional role of Ti3C2 MXene underlayer in improving the interfacial properties of FTO/hematite and providing Ti source for the construction of Fe2 TiO5/Fe2O3 heterostructure in hematite nanostructure,the bulk and interfacial charge transfer dynamics of hematite are significantly enhanced,and consequently enhancing the PEC *** with the pristine hematite,the as-prepared Ti-Fe2O3 photoanode shows an increased photocurrent density from 0.80 mA/cm^(2) to 1.30 mA/cm^(2) at 1.23 V ***,a further promoted PEC performance including a dramatically increased photocurrent density of 2.49 mA/cm^(2) at1.23 V *** and an obviously lowered onset potential is achieved for the Ti-Fe2O3 sample after the subsequent surface F-treatment and the loading of FeNiOOH *** results suggest that the introduction of Ti3C2 MXene underlayer is a facile but effective approach to improve the PEC water splitting activity of hematite.

关键词： Hematite Photoelectrochemical Water splitting Ti3C2 MXene Underlayer

flowering of Sugarcane Genotypes under Different Artificial Photoperiod Conditions

在线全文

学校读者我要写书评

暂无评论

American journal of Plant Sciences 2015年第3期6卷 456-463页

作者： Maria Letícia G. Melloni Maria Natália G. Melloni Maximiliano S. Scarpari júlio César Garcia Marcos G. A. Landell Luciana R. Pinto Faculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista Jaboticabal Brazil Sugarcane Research Center Instituto Agron&ocircmico de Campinas (IAC) Ribeir&atildeo Preto Brazil

flowering is essential in any breeding programme, particularly in genetic introgression programmes in which flowering synchronism is required. In this work, 16 sugarcane genotypes were evaluated using three different flowering-inductive photoperiod treatments (30 s, 45 s, and 1 min of a daily photoperiod decrease from 12 h 55 of light). Each genotype was planted in 43 L pots (equal proportion of soil, sand, and substrate) with three tillers per pot. Plants with 4 to 6 internodes were placed in a photoperiod facility with three controlled chambers, each chamber containing all 16 genotypes (one treatment per chamber). The temperature range (21°C to 32°C) and humidity were the same for all of the treatments. The flower induction started in September 2010 and ended in April 2011. The plant elongation and flag leaf and inflorescence emergence were recorded and the pollen viability was evaluated by using the iodine staining method. The photoperiod facility provided suitable conditions for flowering, as the plants in the three treatments successfully flowered. The genotypes in the three treatments behaved differently in relation to the date of panicle emergence, with the treatment of 45 s showing better results. The results here presented contribute to synchronise flowering for desired sugarcane crosses, particularly those from introgression programmes between commercial cultivars and species from the Saccharum complex.

关键词： Artificial Induction Leaf Flag Photoperiod Facilities Physiologic flowering Pollen

Influences of yellow and green lights on the visual response of western flower thrips and field verification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International journal of Agricultural and Biological Engineering 2022年第4期15卷 49-56页

作者： Qihang Liu Mingqian Zhao jin Miao Guangchun Fu Yuqing Wu Henan Institute of Science and Technology Xinxiang 453003HenanChina Institute of Plant Protection Henan Academy of Agricultural Sciences Zhengzhou 450002China

This study aimed to determine the effects of spectral light characteristics on the visual response of the western flower thrips,the strengthening mechanism of thrips response behavior regulated by light,and thrips response characteristics to contrast *** with combined and single wavelength were tested by using a self-made behavior response device for *** sources for trapping thrips were made to verify the trapping effect on thrips in a greenhouse,and the reasons for changes in thrips behavior were analyzed to characterize the mechanism of their phototactic *** results showed that the light mode(single,contrast,combined light)affected the thrips visual response and approach response,whereas in contrast light,the effects were *** light inhibited the thrips visual response,and when the illumination increased,the thrips visual response to single and combination light intensified,and the thrips approach sensitivity to green light increased in contrast and combination ***,the light mode did not affect the thrips visual response and sensitivity to spectral light *** degree of thrips visual response to yellow light was stronger than that to green light,while the degree of thrips visual response to green light was stronger than that to yellow light,indicating that the photo-induced mechanism of the thrips visual response differed from that of the thrips approach ***,in the greenhouse,the trapping effect of different light sources on thrips was positively correlated with *** trapping effect of green light was optimal,followed by a yellow light source,while the difference of light intensity(illumination,illumination energy)and its photo-thermal intensity between yellow and green light was the reason for the differences in the degree of visual trends and the trapping effects of ***,the sensitivity of thrips responding to different light depended on the difference in the hete

关键词： pest control western flower thrips yellow and green light visual response field verification light mode