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双季稻作生产灌溉必不可少。Irrigation is essential in double ri ce systems.

文中讨论了双季稻区稻水象甲生活史对策的适应意义。The ecological implication of this life history strategy of rice water weevil was discussed.

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表现出丰产、稳产、中早熟和适应性较强等优点，适宜于中高海拔地区及长江流域中下游双季稻作区种植。It is suitable to popularize in the area of medium or high altitude and double cropping of rice.

协优9308在孕穗期和抽穗期比常规品种更易遭受低温冷害，不适宜作为双季稻的晚稻种植。The variety Xieyou 9308 was easy to be injured by low temperature than conventional varieties and not suitable to be sowed as late rice.

探讨红壤地区双季稻田改制对作物生长及土壤养分变化的影响，为灌溉条件较差稻田种植制度改革提供有效模式。This paper aimed to determine the effects of cropping system change for red soil paddy field with double harvest rice on crops growth and soil nutrient.

用吸虫器采样法，对双季稻区中处于多样化生境及单一生境中的两类稻田中的节肢动物群落结构特征进行了比较研究。The community structure of arthropods both in heterogenous and in monotogenous habitat in two-crop paddy field area was studied with the suction sampler.

为系统地了解不同施肥制度下各生育期氨挥发损失的程度及规律，采用密闭室法对南方红壤地区双季稻田的氨挥发进行了监测。Ammonia volatilization from double-rice cropping field in red paddy soil was determined in a closed air-flow chamber under different fertilization systems.

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006年在双季稻田中研究了免耕抛栽水稻的氮、磷、钾营养特性。Field experiments were conducted in double cropping rice field during 2005-2006 to study the effects of no-tillage cast transplanting on rice nutritional characteristics.

在湘北滨湖稻区的情况下，可以结合双季稻的耕作栽培，连续压低虫源作为控制螟害的一项措施。Under the conditions of Yuankiang and Nanhsien, Hunan, certain practices in the cultivation of double-cropping rice might be utilized as a part of the means of paddy borer control.

研究双季稻田不同施肥量处理的氮磷降雨径流损失规律，对于指导双季稻合理施肥、保护水环境具有重要的现实意义。It was significant to study the nitrogen and phosphorus losses from surface runoff in double cropping rice filed for guiding the rational fertilizer and protecting water environment.

以江南双季稻生长评估模型为工具，模拟了常德地区1961-2000年早稻的生长状况。Based on simulated model of JiangNan Double Crop Rice, growth and development status of early rice effected only by climate condition in ChangDe Area from1961to2000were simulated respectively.