水稻群体叶面积动态类型的研究  

STUDIES ON THE TYPES OF LEAF AREA DYNAMICS OF POPULATION IN RICE

作　　者：苏祖芳[1] 郭宏文[1] 李永丰[1] 张洪程[1] 张海泉[1] 

机构地区：[1]江苏农学院,江西赣州地区农业局,江苏省农业科学院现代化研究所

出　　处：《中国农业科学》1994年第4期23-30,共8页Scientia Agricultura Sinica

摘　　要：试验以杂交中籼稻汕优６３和中粳稻盐粳２号为材料，通过施肥量、施肥时期和栽插密度，研究群体叶面积消长动态和株型、产量形成的关系。主要结果：１．方程可以描述群体叶面积动态过程，根据水稻主要生育时期的ＬＡＩ大小及其生长动态变化，可以分为５种叶面积动态类型，Ⅳ型是最合理的叶面积动态类型。２．在合理群体叶面积动态条件下，合理株型为倒２、３叶较长且挺立，倒４、５叶较短，抽穗期单茎茎鞘重高。３．在较大的ＬＡＩ基础上提高单茎茎鞘重，并协调抽穗期的ＬＡＩ和单茎茎鞘重是超高产的途径。By using Shanyou 63 and Yangeng 2 as test materials, the leaf area dynamics and its effects on plant type and grain yield were studied by means of carryting out the experiments of time and amounts of N-fertilizer applied and density of Planting. The main conclusion were as follows:1. The developing process of LAI as the days after transplanting could be expressed as The leaf area development model of different treatments could be divided into five types according to the leaf area dynamic characteristics of main rice growth phases. The Ⅳ-type was recognizeed to be reasonable. 2. Under a reasonable population it was more benefit to improvement of grain yield that one plant Type must be the particular association of longer and more upright 2-3 leaves, but shorter 4-5 leaves from the top, and shorter lower internodes,but longer 2 internodes from the top, and weight of culm and sheath per shoot at beading must be high .3.It was necessary to Pay much attention to raising weight of culm and sheath per shoot under coordinating LAI and weight of culm and sheath per shoot at heading in order to achieve higher and higher grain yields.

关 键 词：水稻 株型 单茎茎鞘重 群体叶面积 

分 类 号：S511.101[农业科学—作物学]