北疆50年来棉花主栽品种库特性演替规律的研究

Studies on the Evolutionary Changes in Characters of Sink of Upland Cotton Varieties in the Course of Replacement of Varieties in North Xinjiang over the Past Fifty Years

以北疆 5 0年来棉花品种更替过程中的 12个主栽品种为研究对象 ,研究了在品种更替中各品种库特性的演替规律。结果表明 :品种更替过程中 ,伴随着产量上升各品种衣分、单株结铃数提高 ,而铃重变化不明显 ,各品种收获指数 (HI )及单铃干物质积累的生产特征值 (GT )升高 ,说明品种更替中棉花品种的库容增强 ,因此品种更替过程中 。

The evolutionary changes of twelve main cotton varietiesin north Xinjiang over the past fifty years were studied.we have studied sink evolutionary changes of every cultivates in the course of cotton varieties replacement.The results were as follows:with cotton yield increasing,boll lint percentage number of bolls,economic index and growth trait value of dry matter cumulative of boll increased,but the boll weight changed insignificantly.This indicates that sink capacity of cotton varieties strengthens,moreover,with cotton varieties being replaced,the improvement of pool traits result in cotton yield increasing.