农业资源与环境学报2017，Vol.34Issue(2)：108-114,7.DOI:10.13254/j.jare.2016.0200
残留地膜对棉花和玉米苗期根系形态和生理特性的影响
Effects of Agricultural Plastic Residual Films on Morphologic and Physiological Characteristics of Root System of Cotton and Maize in Seedling Stage
摘要
Abstract
Pot experiments were conducted to study the effects of residual films(0, 90, 180, 360, 540, 720, 900 kg·hm-2)on growth(dry mat-ter, height and leaf area), root morphology(root length and root surface area)and root physiology(root activity, CAT and POD)for cotton and maize in seedling stage, and the work was also to find the critical value of residual films which made obvious difference for two different crops in growth in seedling stage. The results showed that within the range from 0 to 540 kg·hm-2, residual films had no significant effect on the cotton height and leaf area in seedling stage, while maize height and leaf area decreased sustainably with the increase of residual films, which began to decrease markedly from the residual level of 90 kg·hm-2. Root growth and physiological indexes for cotton and maize in-creased firstly and then decreased with the increasement of residual films. The largest values of the root length and root surface area or the root activity, CAT and POD occurred in residual level of 90 to 180 kg·hm-2. Maize had the less critical values of residual films than cotton in seedling stage because maize had developed root system and exposed to more residues. It was concluded that appropriate residual films(90 to 180 kg·hm-2)may promote the growth of seedling root, and residual films which is over that range will have a negative effect on the growth of seedling root.关键词
残留地膜/根系形态/根系生理/胁迫/棉花/玉米Key words
residual film/root morphology/root physiology/stress/cotton/maize分类
资源环境引用本文复制引用
李元桥,何文清,严昌荣,郭瑞,赵彩霞..残留地膜对棉花和玉米苗期根系形态和生理特性的影响[J].农业资源与环境学报,2017,34(2):108-114,7.基金项目
国家自然科学基金(31370522) （31370522）
国家"十二五"科技支撑计划"旱作农业关键技术研究与示范"项目(2011BAD09B01) （2011BAD09B01）
农业部公益性行业(农业)科研专项经费项目(201503105) （农业）
