南疆绿洲区枣棉滴灌间作的种间光环境及茎流分析
Light Environment and Stem Flow Analysis for Interspecific of Jujube Intercrop Cotton under Drip Irrigation in Oasis Area of Southern Xinjiang

研究滴灌下枣树和棉花的光竞争关系和茎流量，旨在为南疆枣棉复合经营模式的节水技术应用提供依据。结果表明，间作系统中枣树和棉花净光合速率均呈双峰曲线，棉花峰值较枣树有所延迟；750 m3·hm-2的滴灌定额对红枣净光合作用有利。450～750 m3·hm-2时则对棉花光合有利；种植间距对枣树净光合速率的影响较小，而对棉花影响较大；低滴灌定额对枣树蒸腾速率影响显著，灌水定额对棉花蒸腾速率影响较小；枣树蒸腾速率易受种植间距影响，棉花则相反。枣棉的茎流规律趋于一致，并且茎流和蒸腾速率呈显著相关关系（P<0.05）。
This paper studied the light competition and stem flow between jujube and cotton in intercropping system under drip irrigation its purpose is to provide the theoretical basis for application of water-saving technology in cotton and jujube complex business in southern Xinjiang. the result indicated that net photosynthetic rate of jujube and cotton intercropping system showed a bimodal curve，but cotton peak was delayed compared with peak of jujube, drip irrigation quota fixed 750 m3·hm-2 was favorable for net photosynthesis of jujube, and 450-750 m3·hm-2 was favorable for cotton photosynthesis. Planting spacing for date tree affected a little the net photosynthetic rate, while significantly affected net photosynthetic rate of cotton. Lower drip irrigation quota affected significantly transpiration rat of jujube tree , irrigation quota affeced cotton transpiration rate a little; Transpiration rate of jujube tree was susceptible to planting spacing, while cotton was on contrary. Laws of stem flow for dates and cotton was consistent, there exists significant correlation between stem flow and transpiration rate for jujube and cotton (P<0.05)