寒地水稻优化施肥技术

Optimized Fertilization Technique of Rice in Cold Area

氮素是影响水稻产量和品质的重要因子,也是影响农田生态条件的重要因子,通过了解黑龙江省稻田土壤氮循环规律,根据土壤地力等级,确定稻田施氮量,按照水稻对氮素的吸收规律适量补充氮肥,凭借叶龄模式理论确定水稻生育时期,利用叶色卡的色级与叶片的颜色比较确定氮素的丰缺状况,适时适量追施促花肥和保花肥,调控水稻长势长相,产量达到8.5～9.0 t/hm2的目标。

Nitrogen is an important factor to affect rice yield and quality and ecological conditions in the field. The nitrogen amount is determined through the understanding of nitrogen circle principle in the paddy field and based on fertility level. Furthermore, the nitrogen fertilizer is added according to nitrogen absorption law in rice plant, the growth stage is determined relying on leaf age model theory, and the abundance and deficiency of nitrogen is determined depending on leaf color test card. The yield is able to reach 8.5 or 9.0 t/hm^2 through the application of flower accelerating and conserving fertilizer to adjust plant growing status.