拉萨河谷地区春青稞施氮效应灰色关联度分析  

The Grey Correlative Degree Analysis on the Fertilized Nitrogen Effect on Spring Barley in the Region of the Lhasa River Valley

作　　者：钟志明[1] 张宪洲[1] 成升魁[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101

出　　处：《安徽农业科学》2008年第25期10993-10995,共3页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(30600085);中国科学院农发办项目(KSCXZ-YW-N-44)资助

摘　　要：[目的]为西藏拉萨河谷地区春青稞氮肥利用效率及生产力水平的提高提供理论依据。[方法]应用灰色关联度分析法,对不同施氮水平条件下春青稞8个农艺性状与产量性状的关联度以及施氮水平与理想施氮量的关联度进行研究。[结果]不同施氮水平条件下,春青稞农艺性状与产量的关联度排序为株高〉穗粒数〉穗数〉穗长〉千粒重〉生育期〉小穗数〉退化小穗数;5个施氮水平按关联度大小的排序结果与根据产量大小的排序结果并不一致,其中关联度最大的为施氮量225 kg/hm^2;春青稞的最佳施氮水平分布范围大致在150-225 kg/hm^2。[结论]培育大穗与较高秆（抗倒）品种,提高单穗小穗数与穗粒数可能应成为春青稞育种与栽培管理工作的主攻目标。[ Objective] The aim of the research was to give an academic support to improve the nitrogen use efficiency and the production of spring barley in the region of the Lhasa River valley. [Method] Based on the application of the gray correlative analysis, the gray correlative degree between eight agronomy properties and yield, and the the gray correlative degree between 5 different levels of fertilized nitrogen quantity and the ideal nitrogen quantity fertilized was researched. [Result] Under the conditions of different levels of fertilized nitrogen, the sort order of the agronomy properties for spring barley according to the value of the correlative degree was plant height, grain number per spike, spike number per hm^2, spike length, weight per 1 000 grains, growth period, spikelet number per spike and invalid spikelet number per spike. The sort order of 5 level of fertilized nitrogen according to the correlative degree was different from that according to the yield. The fertilized nitrogen at 225 kg/hm^2 had the maximal degree, and the distributing range of fertilized nitrogen for spring barley was among the quantities from 150 to 225 kg/hm^2. [ Conclusion] As a result, breeding and cultivation of plant with bigger spike and somewhat higher stalk to increase spikelet number and grain number per spike, probably would be the direction to promote spring barley production in the future.

关 键 词：拉萨河谷地区 春青稞 施氮效应 灰色关联度分析 

分 类 号：S143.1[农业科学—肥料学]