密度对弱筋小麦扬麦9号优质高产群体质量和株型指标的影响  

Effects of planting density on quality and plant type indices of good-quality and high-yield population of the weak wheat cultivar Yangmai 9

作　　者：徐月明[1] 

机构地区：[1]扬州环境资源职业技术学院,扬州225127

出　　处：《上海农业学报》2010年第2期81-85,共5页Acta Agriculturae Shanghai

摘　　要：通过不同密度试验,研究密度对弱筋小麦扬麦9号优质高产群体质量和株型指标的调控效应。结果表明:①弱筋小麦扬麦9号以基本苗240万株/hm^2最能建立合理的优质高产群体结构;②扬麦9号产量>7 500 kg/hm^2优质高产株型指标和群体质量指标为:上三叶面积顺序为倒二叶>剑叶>倒三叶,株高为80 cm左右,穗下节间/节间总长为35.5%左右,(穗下节间+穗长)/株高为43.6%左右,株高构成指数0.563,每穗43粒左右,单穗重1.55 g左右,花后干物质积累量4 000～4 500 kg/hm^2,高峰苗1 100万/hm^2左右,成穗数500万/hm^2左右;LAI的动态指标是越冬始期约0.9,拔节期约3.0,孕穗期出现最大值7.0,开花期为4.5～5.0。The field experiment with the weak wheat cultivar Yangmai 9 was conducted to study the effects of planting density on the quality and plant type indices of the cultivar＇s good quality and high yield population. The results showed that （1） at the density of 2.40 million basic seedlings/hm^2 the good-quality and high-yield population structure could be established best, thus coordinating the conflict of group and individual development; （2） the plant type and quality indices of good-quality and high-yield population of the cultivar yielding over 7 500 kg/hm^2 grain were as follow：the descending order of leaf area was penultimate leaf〉flag leaf 〉antepenultimate leaf;the plant height was about 80 cm;the ratio of peduncle length to stem length was about 35.5%;the ratio of peduncle and ear length to plant height was about 43.6%;the plant height component index was about O. 563;the number of grains per ear was about 43 ;the ear weight was about 1.55 g;the amount of dry matter accumulated from anthesis to maturity was 4 000 - 4 500 kg/hm^2; the maximum seedling number was 11 million/hm^2 ;the ear-bearing tiller number was 5 million/hm^2 ;and the leaf area index was about 0.9 at early wintering stage,3.0 at jointing stage,7.0 at booting stage,and 4.5-5.0 at flowering stage.

关 键 词：弱筋小麦 种植密度 株型指标 群体质量 

分 类 号：S512.04[农业科学—作物学]