Severe water deficit at seedling stage and wadding stage , medium water deficit at buds and bolls stage can be propitious to cotton yield 结果表明，调亏灌溉对棉花株高、蕾铃脱落、成桃数等影响较显著；苗期和吐絮期重度水分亏缺、蕾铃期中度水分亏缺均有利于棉花产量的形成。
2.
The knowledge model for the dynamics of main development indices includes submodels of suitable development stages , plant height , leaf area index , dry matter accumulation , numbers of fruit branch , square and boll , plant nutrient accumulation 生育指标动态知识模型包含有适宜生育期、株高、叶面积指数、干物质积累量、果枝和蕾铃数目，营养物质积累量等。
3.
Topdress different amount urea on cotton under film - mulching and drip irrigation during the blooming period , the result showed that content of nitrogen of root , leaf , leaf - stem and reproductive organ of cotton with nitrogen treatment were higher than non - treatment , but the increase had no relation with the amount of nitrogen topdressing 摘要在棉花花铃期膜下滴施不同量尿素，结果表明，追氮处理后棉株根、叶片、叶柄和蕾铃的氮含量比不追氮处理要高，但增高多少与追氮量没有明显关系。
4.
The knowledge model for the dynamics of main development indices as plant height , leaf area index , dry matter accumulation , numbers of fruit branch , square and boll was developed based on the physiological time and target yield and quality . in addition , the dynamic relationships between plant nutrients and dry matter accumulation was quantified . all these sub - models provide the reference standards for quantitative and dynamic growth diagnosis and management regulation 进一步根据产量和品质目标构建了株高、叶面积指数、干物质积累量、果枝和蕾铃数目变化与生理时间之间的动态关系知识模型，初步量化了棉株养分积累量与干物质积累量之间的动态关系，从而为定量化的苗情诊断和管理调控提供了参考标准。
