作物学报Issue(12)：2169-2175,7.DOI:10.3724/SP.J.1006.2014.02169
小麦秸秆还田和施钾对棉花产量与养分吸收的效应
Effects of Wheat Straw Returning and Potassium Fertilizer Application on Yield and Nutrients Uptake of Cotton
摘要
Abstract
A three-year stationary experiment with treatments of wheat straw (4500 kg ha–1 and 9000 kg ha–1) mulching and K fertilizer (150 kg K2O ha–1 and 300 kg K2O ha–1) application was conducted using insect-resistant cotton under wheat-cotton dou-ble cropping system in the Lower Reaches of Yangtze River (Nanjing). The results showed that compared with control (without K fertilizer and wheat straw returning), total wheat straw returning significantly increased boll number, boll weight and lint yield of cotton with lint yield increasing rate of 143.5% and 93.7% in the second and third years after straw returning, respectively. Bio-mass and nutrients absorption at different growth stages were significantly improved by total wheat straw returning, especially in the boll opening stage, and the senescence of vegetative organs was delayed. Wheat straw returning promoted K absorption much greater than N and P absorption. Compared with control, total K uptake by cotton plant and K uptake per 100 kg lint increased by 335.1% and 112.1% respectively in the third year after straw returning. The treatment of total wheat straw returning much pro-moted nutrients uptake, yield, and delaying premature senescence than the treatment of half wheat straw returning, while signifi-cantly less than the treatment of 300 kg K2O ha–1. The yield-increasing effect was equal but the nutrients uptake per 100 kg lint was less in the treatment of total wheat straw returning than in the treatment of 150 kg K2O ha–1.关键词
秸秆还田/化学钾/棉花/养分吸收/产量Key words
Wheat straw returning/K fertilizer/Cotton/Nutrients absorption/Yield引用本文复制引用
张凡,睢宁,余超然,刘瑞显,杨长琴,宋光雷,孟亚利,周治国..小麦秸秆还田和施钾对棉花产量与养分吸收的效应[J].作物学报,2014,(12):2169-2175,7.基金项目
本研究由国家自然科学基金项目(31371583)和江苏省农业科技自主创新资金项目(CX(12)3034)资助。 （31371583）
