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- Studies on Yield Loss and Dynamic Economic Threshold of Cowpea Aphid Aphis craccivora Koch on Cowpea, Vigna sp. 豆蚜危害豇豆损失率及动态经济阈值研究。
- Sharp eyespot of wheat is one of the most important diseases causing severe yield loss in Yangtze River and Huanghe River Region of China. 分别用玉米粉-砂、麦粒和玉米秸秆作为小麦纹枯菌生长基质,培养获得小麦纹枯病菌接种物。
- The bacterial leaf blight (BLB) is an important vascular disease to irrigated rice and may cause substantial yield loss under serious conditions. 摘要白叶枯病系水稻一重要维管束型病害,严重感染将可能导致明显减产。
- Aberrant weather in cane growing States such as Maharashtra, Andhra Pradesh and Karnataka has created risk of yield loss. 谢亚龙:实话告诉你,这次让你退场的目的就是让全国人民骂你。
- This article analyzed the loss mechanism of the brim seal of floating-roof tank, and introduced the structure characteristics of second sealing. 分析了外浮顶罐边缘密封损耗机理,介绍了二次密封的结构特点,通过二次密封与挡雨板对比,说明二次密封的经济效益和安全效益。
- Plant-parasitic nematodes cause heavy yield losses in many crops . 在许多农作物中,植物寄生线虫引起重大损失。
- Through loss mechanism investigation for a gapped inductor ,copper winding scheme and litz wire winding scheme for gapped inductor was evaluated. 对高频率和大电流的开关功率变换器,电感器损耗对温升及变换器效率指标具有重要影响。
- Soybean mosaic virus (SMV) is one of the worldwide diseases, which causes yield loss and quality deficiency severely in soybean. 摘要大豆花叶病毒病是为害大豆生产的世界性病害,严重影响大豆产量和品质。
- The research of this thesis was mostly run on fluid loss mechanism of emulsified fracture fluid in tuffaceous reservoir. 本课题主要针对灰岩油藏乳化压裂液降滤失机理开展研究。
- Effect of different densities of Empoasca vitis on the yield loss rate and the damage indexes of fresh tea leaves was evaluated with the net method. 摘要利用网罩法测定了假眼小绿叶蝉不同虫口密度对茶鲜叶产量及受害指数的影响。
- An interpretation seems to be given that the PFZ may be formed by a vacancy loss mechanism at initial stage of mechanism during sequent... 而时效过程中,随着晶界沉淀相的形核和长大,PFZ逐渐宽化.这说明,时效初期,PFZ是由空位贫化机制形成的;
- An In addition, the researchers found that the plants good could survive on only 30% of the normal amount of irrigation water. Ill Yield loss was manner minor, they said. 除此之外,研究人员发现,这些转基因植物可以在只有正常值30%25的水量灌溉条件下生存下来。他们说:生长损失是次要的。
- The electromagnetic loss mechanism was analyzed and influences of EPS and CB filling ratios, EPS diameter and sample thickness were also analyzed in the paper. 通过分析EPS水泥的内部结构来研究其微波损耗机理,分析了EPS和炭黑填充率、EPS颗粒直径以及试样厚度对材料吸波性能的影响。
- On the basis of the results achieved above, the models for disease index and yield loss ratio and for disease index and weight per kilograin were established. 千粒重随着病情指数的增加呈下降趋势;并在此基础上组建了病情指数与产量损失率的关系模型;病情指数与千粒重的关系模型.
- During spot welding of aluminium alloys,ignition loss of electrodes is a crucial problem,so the study on ignition loss mechanism of electrodes is very important. 铝合金电阻点焊工艺中存在的一个主要技术难题就是电极磨损,探索铝合金点焊电极的磨损机理至关重要。
- On the basis of the results mentioned above, the model for disease index and yield loss ratio, disease index and the kilograin weight was established, respectively. 千粒重随着病情指数的增加呈下降趋势,并在此基础上组建了病情指数与产量损失率的关系模型,病情指数与千粒重的关系模型。
- A field experiment was conducted to determine the relationships between the yield loss of summer maize and the infestations of Amaranthus retroflexus and PoHulaca oleracea. 为了明确杂草种类对杂草密度与夏玉米产量损失之间的函数关系的影响及反枝苋和马齿苋为害夏玉米的产量损失模型,在田间开展了此项研究。
- The accumulated loss of photosynthate was 11.4% and yield loss was 17.8% at ambient O3 concentration in the wheat growth period under sufficient moisture and fertilizer supplies. 对冬小麦春后生育期(3-5月)的研究表明,水肥适宜时,由O3影响造成的该地区冬小麦干物质累积总损失量为11.;4%25,产量损失为17
- We will never yield to invaders. 我们绝不会向侵略者屈服。
- The main reasons of yield lossing were the obvious reduction in weight of thousand gains and the fructiferous rate. 导致减产的主要原因是结实率和千粒重显著降低。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries