氮肥对非充分灌溉下棉花花铃期光合特性及产量的补偿作用

石洪亮,严青青,张巨松,李春艳,窦海涛

Compensation Effect of Nitrogen Fertilizer on Photosynthetic Characteristics and Yield during Cotton Flowering Boll-setting Stage under Non-sufficient Drip Irrigation

Hong-Liang SHI,Qing-Qing YAN,Ju-Song ZHANG,Chun-Yan LI,Hai-Tao DOU

表1 土壤基础理化性质

Table 1 Basic physicochemical properties of soil

年份 Year 土层深度 Soil depth (cm) 全氮 Total N (g kg-1) 有机质 Organic matter (g kg-1) 水解性氮 Hydrolytic N (mg kg-1) 有效磷 Available P (mg kg-1) 速效钾 Available K (mg kg-1) 2015 0-20 0.50 6.90 105.00 32.40 131.00 20-40 0.40 5.60 70.80 21.60 168.00 40-60 0.20 2.20 45.00 2.60 240.00 2016 0-20 0.62 8.00 32.60 24.80 111.00 20-40 0.44 3.00 23.20 6.00 126.00 40-60 0.34 2.00 13.80 1.80 152.00