苏啤3号大麦长势与穗粒结构的关系分析

目的]研究苏啤3号大麦种植的气候适宜性和适宜的管理栽培措施。方法]2005年10月至2006年5月开展苏啤3号的种植试验。结果]苏啤3号在冬前期以长个体为主;江苏里下河地区常因暖冬造成旺长,引起冻害;返青和拔节期是大麦群个体关系最为复杂的阶段;抽穗期是发挥叶功能的关键阶段。结论]冬前期生产管理措施主要以实现壮苗越冬为目标;冬季生产管理措施重点要以防止旺长和冻害为主;返青和拔节期田间管理的核心是要控群体促个体,提高整体素质;抽穗期要以防早衰为田间管理的重点。可以根据各类长势指标与单产的定量关系上机计算模拟出不同单产对应的长势指标定量值。通过生产管理措施,调控群个体,可以让长势向着设计的产量方向发展。

Analysis on the Relationship between Growth Vigor and Spike-grain Structure of Supi 3 Barley

Objective] The research aimed to study the climate suitability for planting Supi 3 and its suitable cultivation and management measures.Method] Planting experiment of Supi 3 was conducted from October 2005 to May 2006.Result] In stage before winter,Supi 3 gave priority to the growth of individuals.Vigorous growth was often caused by warm winter in Lixiahe region of Jiangsu province,which led to the freezing injury.Regreening stage and jointing stage were the stages that the relationship between individuals and populations was the most complicated.Heading date was key stage for playing functions of leaves.Conclusion] The production management measures in stage before winter,implementing strong seedlings overwintering should be taken as target.The production management measures in winter should lay emphasis on preventing vigorous growth and freezing injury mainly.The core of field management in regreening stage and jointing stage was controlling populations,promoting individuals and improving population quality.The field managements in heading stage should take preventing early senescence as keystone.According to the quantitative relationship between kinds of growth vigor indexes and unit yield,the quantitative values of growth vigor indexes in correspondance with different unit yields could be simulated.Regulating populations and individuals through production management measures could make growth vigor develop toward designed yield direction.