不同密度下短季棉成铃时空分布及产量比较研究  

Studies on Bolls Spatial and Temporal Distribution and Yield of Short-season Cotton under Different Planting Densities

作　　者：房卫平[1] 谢德意[1] 李文[2] 马宗斌[2] 李伶俐[2] 

机构地区：[1]河南省农业科学院经济作物研究所,河南郑州450002 [2]河南农业大学农学院,河南郑州450002

出　　处：《河南农业科学》2011年第1期58-61,共4页Journal of Henan Agricultural Sciences

基　　金：国家公益性行业科研专项(nyhyzx07-005-6)

摘　　要：以短季棉中棉50号为材料,设2.25万、4.50万、6.75万、9.00万、11.25万、13.50万株/hm^26个密度处理,在麦后移栽条件下,研究了不同密度对短季棉成铃时空分布和产量的影响。结果表明,不同种植密度下,棉花均以第6-10果枝（占38.45%以上）和第1果节（占43.22%以上）为成铃的主体。种植密度对不同部位果枝的成铃分布影响较小,但对不同果节成铃分布影响较大。随着密度的增加,第1果节的成铃占总成铃的比例增加,第3和第4果节以上表现出相反的趋势,第2果节成铃比例以9.00万株/hm^2（中密度）的处理最高（为32.92%）。从成铃时间上看,随着密度的增加,伏桃和早秋桃总数呈增加的趋势。短季棉中棉所50号在麦收前育苗、麦后移栽时的适宜密度为6.75万-9.00万株/hm^2,比一般生产上短季棉的适宜密度略低。Effects on bolls spatial and temporal distribution and yield were studied under intransplanted cotton following wheat harvest with different planting densities using short-season cotton variety CCR150.The results showed that the 6th-10th fruiting branches and the 1st fruiting nodes were the key positions for boll setting of cotton（more than 38.45%,43.22%,respectively）.Planting densities had small effect on bolls spatial distribution of different fruiting branches but had greater effect on different fruiting nodes.Number of bolls setting on 1st fruiting nodes increased with planting densities while the trend was contrary on 3rd and above 4th fruiting nodes.As to the temporal distribution of boll setting,summer bolls and early autumn bolls increased with planting densities.The optimal planting density of short-season cotton variety CCR150 was 67500-90000 plants/ha under this experiment conditions which was slight lower than conventional cultivation.

关 键 词：短季棉 密度 成铃 时空分布 产量 

分 类 号：S562[农业科学—作物学]