水稻旱育稀植高产机理和调控技术 Ⅱ.水稻旱育稀植高产的生态学机理  

The mechanism of high yielding in rice under dry raising seedling and thin planting and its regulating technique Ⅱ.Ecological mechanism of high yielding in rice under dry raising and thin planting

作　　者：王松良[1] 林文雄[1] 梁义元[1] 余高镜[1] 

机构地区：[1]福建农业大学作物科学学院,福州350002

出　　处：《福建农业大学学报》1999年第2期135-141,共7页Journal of Fujian Agricultural University

基　　金：农业部丰收项目;福建省教委基金

摘　　要：肥床旱育增加了苗床土壤的微生物类群并提高土壤酶活性和土壤养分有效性，培育出壮根、矮化、带蘖秧苗；旱育秧移栽前后均表现出强大的生理生化优势；旱育稀植有利于协调水稻个体和群体生长，使其中期在增加有效穗的基础上，提高成穗率，促进后期高光效群体的形成，并优化群体产量的穗粒结构．试验表明，旱育秧产量主要分布在主茎和 １／０～５／０ 叶节位穗上，而对照分布在主茎和３／０～７／０ 叶节位穗上．Resulting from nursing with fertilizing seedling bed, the total number of soil microorganism and soil enzyme activities were increased, which in turn improved the efficiency of soil nutrients, thus produced the seedlings with vigorous roots, dwarf plants and more low node tillers.The studies also showed that the seedlings from dry raising had the physiochemical advantage both before and after transplanting.It could conclude that the growth of individual and population of rice harmonized through dry raising and thin planting, with the rates of tiller enhanced at middle stage and the high photosynthetic efficient population formed at late stage, at last the distribution of its panicles optimized, the analysis of grain yield structure showed that its panicles were distributed on main stem and 1/0-5/0 tillers, comparatively the controls ′ on main stem and 3/0-7/0 tillers.

关 键 词：水稻 旱育稀植 生态学机理 

分 类 号：S511[农业科学—作物学]