不同控释肥对冬小麦产量及氮素利用的影响

Effects of Different Controlled Release Fertilizers on Yield and Nitrogen Utilization of Winter Wheat

为了探求适宜鲁西北地区的冬小麦缓控释肥品种,通过两年的定位试验,研究了5种控释肥对冬小麦群体结构、产量和氮肥利用率等方面的影响,并进行了综合评价。结果表明,与当地优化施肥(OPT)相比,三种控释肥处理(CRFA、CRFB、CRFD)能有效调控冬小麦群体,在产量、收获指数和氮素转运比例方面无显著差异,能达到预期目标。与OPT相比,CRFA、CRFB处理的氮肥利用率分别提高5.09个百分点和4.33个百分点。综合分析得出,与当地优化施肥相比,CRFA和CRFB的养分释放特性更符合当地冬小麦生长规律,其次是CRFD处理施用的控释肥。

In order to explore the suitability of different controlled release fertilizer varieties for winter wheat in Northwest Shandong,through two-year experiment,the effects of different controlled release fertilizers on winter wheat population structure,yield and nitrogen use efficiency were studied,and the comprehensive evaluation was conducted. The results showed that compared to the local optimum fertilization（ OPT）,CRFA,CRFB,CRFD treatments could effectively control the winter wheat population,and there were no significant differences in yield,harvest index and nitrogen translocation ratio,so they could reach the expected goal. Compared with OPT,CRFA and CRFB treatments increased the nitrogen use efficiency by 5. 09 and 4. 33 percentage points,respectively. According to the comprehensive analysis,the nutrient releasing characteristics of CRFA and CRFB treatments were more suitable for the growth of winter wheat,followed by the CRFD treatment.