棉花膜下滴灌水氮耦合效应研究  

Coupling effect of water and nitrogen of cotton under plastic mulching by drip irrigation

作　　者：刘新永[1] 田长彦[1] 

机构地区：[1]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011

出　　处：《植物营养与肥料学报》2007年第2期286-291,共6页Journal of Plant Nutrition and Fertilizers

基　　金：中科院知识创新重大项目(KZCX1-08-01)资助

摘　　要：在南疆气候条件下,研究了膜下滴灌棉花水氮耦合效应。结果表明,在膜下滴灌条件下,水氮存在明显的互作效应,水分胁迫极大地抑制肥效发挥,而水分适宜时,不同氮肥处理棉花产量差异显著;氮肥也促进了水分效应的发挥,但是水分是棉花产量的主效应因子。试验中最优水氮组合为每公顷灌水505 mm、氮肥225 kg。高产棉花冠层指标分别为:株高66.9 cm、叶龄15.6个、果枝13.1台、成铃数8.9个。水氮胁迫缩短了棉花生育期,这可能是不同水氮处理棉花产量差异的主要原因。The coupling effect of water and nitrogen （N） of cotton under plastic mulching by drip irrigation was studied in Southern Xinjiang. The results showed that there existed a significant coupling effect between water and N. Water stress greatly inhibited N fertilizer effect, while there was a significant difference between cotton yields of treatment with different N application rate under appropriate irrigation. N fertilizer also promoted water effect; however, water is the main effect factor on cotton yield under plastic mulching by drip irrigation in Southern Xinjiang. Based on the results obtained in this experiment, the optimum combination of water and N was： the irrigation 505 mm and N 225 kg per hectare and the canopy indicators of high-yield cotton were： stem height 66.9 cm, leaf emergence 15.6, fruit branches 13.1 and number of bolls each plant 8.9, respectively. Water stress and N deficiency shorten development period of cotton, which maybe the main reason contributed to the yield difference between different treatments.

关 键 词：膜下滴灌 棉花 水氮耦合 

分 类 号：S562[农业科学—作物学]