不同农艺措施对春小麦群体干物质积累的影响

在灌溉条件下，通过呼和浩特、巴盟两地的试验，系统地研究了春小麦在不同密度和氮、磷、钾三要素施肥量处理下的干物质积累动态。结果表明，春小麦全生育期间群体干物质积累量呈“S”形曲线变化，干物质积累速率呈单峰曲线．且干物质积累量和干物质积累速率因不同密度、不同施肥量处理表现出一定的差异。在适宜密度下。氮磷钾肥适量配施，植株营养吸收平衡协调，群体规模适宜，干物质的积累量最大，干物质积累速率也居于其它处理之上。可见，在生产实践中，只有保证营养元素的平衡供给，合理密植，方可获得较高的经济产量。

Effect of Different Agricultural Measures on Dry Matter Accumulation of Spring Wheat Population

In Huhhot and Bameng, the experiment was conducted to systematically study the dynamic change of dry matter accumulation of spring wheat with different densities and amounts of N, P, K appliced. The results showed that it was as a S-curve with single peak that the dry matter accumulation amount of spring wheat changed in whole growth period. Dry matter accumulation amount and rate were different in different density treatments and different fertilization treatments. Under the proper density and the balancing application of N, P, K, absorption of nutritious elements were coordinated and wheat had a proper scale of population; Dry matter accumulation amount and rate were higher than other treatments. Therefore, by balancing application of all kind of fertilizer and selecting proper density, a higher economic yield could be gained in practice.