江汉平原棉麦套种方式下小麦对养分的利用效率

Nutrient Use Efficiency of Wheat in Cotton-Wheat Interplanting System in Jianghan Plain

利用"3414"肥料试验,研究了江汉平原棉麦套种方式下小麦对养分的利用效率。结果表明,江汉平原小麦NPK配施增产效果最好,增产量和增产率分别为1 838.7 kg/hm2和79.3%,每千克养分可增产小麦6.7kg;NP、NK、PK配施,以NP配施的产量最高,NK配施的产量次之,PK配施的产量最低,研究区域N是影响小麦产量的重要因子。

The nutrient use efficiency of wheat in cotton-wheat interplanting system in Jianghan plain was studied using ＇3414＇ fertilizers tests. When N, P, and K fertilizers were applied evenly, wheat had best yield-increasing effect, the pro- duction increased and increasing rate were up to 1 838.7 kg/hm2 and 79.3% respectively. Among the combined application treatments of N and P, N and K, P and K, the yield of wheat was highest in N and P combined application treatment, then N and K, the lowest was P and K. N fertilizer was the most important factor affecting wheat yield in Jianghan plain.