冬、春小麦冬前播种对干物质积累与产量的影响

【目的】研究冬、春小麦冬前播种对干物质积累与产量的影响,为北疆晚熟作物倒茬高产栽培技术提供指导。【方法】以冬小麦新冬41号、春小麦新春29号为材料,采用裂区设计,研究冬、春小麦冬前播种(10月25日和11月5日较适宜播期晚25~30 d左右)对干物质积累及产量的影响。【结果】冬前播种的冬小麦与春小麦生育期相差2~5 d,10月25日播种的冬小麦叶面积指数高于春小麦,而11月5日播种的冬小麦叶面积指数小于春小麦。冬小麦越晚播越不利于干物质的积累,而冬前播种的春小麦(10月25日以后播种)对干物质积累的影响不大。【结论】11月5日后播种的春小麦(5 483.6 kg/hm²)的产量高于冬小麦(4 562.7 kg/hm²),临冬前(11月5日)播种的春小麦比冬小麦更利于高产。

Effects of Spring and Winter Wheat Sown before Winter on Dry Matter Accumulation and Yield

【Objective】 To provide guidance for high-yield cultivation of late maturing crops in northern Xinjiang.【Method】The experiments was conducted in a field on two varieties,'Xindong 41'and 'Xinchun 29'and two sowing dates (B1 (October 25) and B2(November 5) were set to study the effects of winter and spring wheat sowing before winter on dry matter accumulation and yield. The experiment was a randomize block design with three replication.【Result】The results showed that, the growth period of winter wheat was less than 2-5 days than spring wheat, leaf area index (LAI) of the winter wheat was higher than that of spring wheat on October 25th sowing, but LAI of the winter wheat was lower than that of spring wheat on November 5th sowing. The later the winter wheat was sown, the more unfavorable dry matter accumulation was, but spring wheat sown before winter (seeded after October 25) had little effect on dry matter accumulation.【Conclusion】The yield of spring wheat (5,483.6 kg/hm²) was higher than that of winter wheat (4,562.7 kg/hm²) after on November 5 seed sowing, spring wheat planted close to the snow (November 5) was more conductive to high yield than winter wheat.