Changes in weed community composition of early rice crops due to long-term fertilization
首发时间:2010-03-03
Abstract:The effect of various fertilization treatments on weed species composition of early rice crops were investigated in experimental plots established 26 years previously in Wangcheng county, Hunan province, China. The treatments examined influenced weed flora composition and density. Multivariate analyses showed that changes in the weed community composition were primarily due to light intensity on the field surface, followed by soil available P and N. More weed species and total weed density were observed in the control and NK plots, but less weed species and total density were found in the plots in which N, P, and K were applied together. Omission of P-application had more important influence on the weed community compared with the omission of N-, or K-application. Nutrient source from synthetic fertilizers and organic manure or lime application had no obvious effect on the weed community.
keywords: Weed community Light intensity Soil macronutrient Nutrient source Early rice
点击查看论文中文信息
长期施肥对早稻田间杂草种群组成的影响
摘要:利用一个长达26年的定位试验研究了长期不同施肥对早稻田间杂草种群结构的影响。研究结果表明,长期不同施肥条件下早稻田间杂草的总密度及群落结构存在明显差异,而进一步的多元分析结果揭示了造成这一差异的原因主要是各处理下水稻生长期间的地面光照条件,其次是土壤速效P及有效N;田间杂草的种类与总密度在不施肥(CK)和NK处理下相对较多或较大,而在全面施用N、P、K的处理下较少或较小;P肥的施用对早稻田间杂草群落结构的影响比N肥或K肥大,但养分的施用形态或石灰的施用不显著影响早稻田间杂草的种群结构。
论文图表:
引用
No.4037551773712676****
同行评议
勘误表
长期施肥对早稻田间杂草种群组成的影响
评论
全部评论0/1000