宽幅精播和灌溉对冬小麦干物质积累及产量的影响

Effect of Wide-precision Planting and Irrigation on Dry Matter Accumulation and Grain Yield of Winter Wheat

采用了宽幅精播和常规种植2种种植模式,每种种植模式设3种灌溉处理,研究了宽幅精播和灌溉对冬小麦群体动态变化、干物质积累量和产量等的影响。结果显示,灌拔节水和抽穗水后,宽幅精播的分蘖消亡速率低于常规种植。在冬小麦生育后期,宽幅精播显著提高了干物质积累量。宽幅精播的产量显著高于常规种植,增产的原因在于穗数的显著增加。研究表明,宽幅精播结合灌拔节水和抽穗水为一种值得推广的节水种植模式。

Two kinds of planting patterns,i.e.,wide-precision planting and conventional cultivation planting,and 3 different irrigation treatments,i.e.,irrigated 60.0 mm each at jointing and heading stages,irrigated 60.0 mm only at jointing stage,and non-irrigation in the whole growth period were conducted to study the effect of wide-precision planting and irrigation on populations,dry matter accumulation,and grain yield of winter wheat.The results indicated that after irrigated 60 mm each at jointing and heading stages of winter wheat,the populations of the wide-precision planting were higher than that of the conventional cultivation planting in the later growing season.At milking stage,wide-precision planting irrigated 60.0 mm each at jointing and heading stages significantly increased the amount of dry matter accumulation.Compared with conventional cultivation planting,wide-precision planting had the highest grain yield,which could be attributed to the increased spike numbers.The results indicated that the wide-precision planting irrigated 60 mm each at jointing and heading stages of winter wheat should be extended in North China Plain.