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《Journal of Anhui Agricultural Sciences》 2008-25
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The Grey Correlative Degree Analysis on the Fertilized Nitrogen Effect on Spring Barley in the Region of the Lhasa River Valley

ZHONG Zhi-ming et al (Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101)  
[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 hm2,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/hm2 had the maximal degree,and the distributing range of fertilized nitrogen for spring barley was among the quantities from 150 to 225 kg/hm2.[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.
【Fund】: 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
【CateGory Index】: S512.3
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