棉花学报2011，Vol.23Issue(1)：39-43,5.
应用根系生态位指数研究不同灌溉量棉花根系分布特征
Using RENI to Study the Distribution Characteristics of Cotton Roots in Different Amounts of Drip Irrigation under Film
摘要
Abstract
The cotton root distribution characteristics under different amounts of drip irrigation was studied using root ecological niche index(RENI) which was compared with root parameters(root length, mot dry weight, root volume, root surface area)ahead. And the results surely will be contributed to describing root distribution traits and root research methodology. The results showed: (1) RENI was well correlated with other root parameters and so can reflect root distribution characteristics. The contribution rate of root dry weight to RENI was of maximum under sufficient irrigation, and was of minimum under insufficient irrigation. However, root volume was the least influence factor of RENI under sufficient irrigation, and was the most important influence factor under insufficient irrigation. (2)Shown as skewed normal distribution, the RENI of cotton in the upper layer soil above 40 cm depth accounted for 86.8％ of the total RENI. (3) Roots developed in film-uncovered land were centrally impacted by the distance to the cotton plant, i.e., the closer of the distance, the higher of the RENI.关键词
生态位指数/膜下滴灌/根系分布/棉花/灌溉量Key words
RENI/ drip irrigation under film/ root distribution/ cotton/ irrigation amount分类
农业科技引用本文复制引用
刘凤山,周智彬,陈秀龙,甘永德..应用根系生态位指数研究不同灌溉量棉花根系分布特征[J].棉花学报,2011,23(1):39-43,5.基金项目
国家重点基础研究发展计划(2009CB421302),中科院"西部之光"人才计划"联合学者"(HXZ200801),新疆维吾尔自治区科技攻关重大专项(200731137-3) （2009CB421302）
