新疆棕漠土棉田施N水平对棉花产量和品质及光合特性的影响

通过新疆内陆区干旱区棕漠土棉田膜下滴灌试验，研究了在常规施N（24kg/666.7m2）、优化施N（16kg/666.7m2）条件下，棉花需肥比例、生产常用施肥比例、推荐施肥比例三种施N方式对棉花的产量和品质及光合特性的影响。结果表明：常规施N量下的推荐施N比例可获205.24kg/666.7m2的皮棉产量；常规施N和优化施N对棉花纤维长度、纤维强度、纤维可纺系数影响差异可达到显著水平，而对棉花纤维整齐度、伸长率的影响差异不显著；常规施N的推荐施N比例可使棉花净光合速率在盛铃期达到20μmolCO2/m2.s，并可获得高产；常规施N和优化施N条件下，推荐N比例的棉花叶绿素SPAD值最优。

Xinjiang cotton brown desert soil application of N levels to cotton yield and quality and photosynthetic trait

To explore the arid inland area of Xinjiang cotton nitrogen consumption growth, Through Xinjiang cotton brown desert soil drip irrigation test, study on conventional N （24 kg/666.7m2）, optimization N （16 kg/ 666.7 m2） conditions, the proportion of fat and production of cotton used to fertilizer fertilization proportion and scale of three kinds of N way the yield and quality of cotton and photosynthetic trait. Results show that： the con- ventional N ratio can be recommended by the true lint yield about 205.24 kg/666.7 m2,Conventional N and opti- mization of cotton fiber length of N, fiber strength, fiber spinnability differences can achieve significant influ- ence coefficient of cotton fiber, uniformity, the difference was not significant influence elongation, The conven- tional N ratio can be recommended to cotton net photosynthetic rate boll period in 20 IxmolCOJ（m2 s）,and can obtain high, Conventional N and optimization N conditions, the proportion of cotton N recommendations SPAD chlorophyll optimal value.