水稻配方施肥技术研究

二因素三水平氮、磷配比试验表明,不施氮肥的三个处理始穗期比其它处理提前2 d,齐穗期提早两天,且提早成熟3~5 d。随施肥量的增加,最高分蘖也增大,分蘖势也强;而施磷肥处理成穗率则较高;氮、磷配合施用,绿叶数增多,植株生长旺盛,叶片肥厚,为植株高产奠定了基础。在产量较高的田块上,氮肥效应较大,氮、磷肥交互作用较小;产量水平较低的田块上,磷肥效应则较大,氮、磷肥交互作用也较大;所以在中等肥力的土壤上,必须强调氮、磷肥料的配合施用,充分利用氮、磷肥的交互作用效应,充分发挥氮、磷肥的增产效应。土壤生产水平由低到高,肥料配合施用的N∶P比例由小到大,而一般以1∶0.30~0.45为宜。

Study on the Technique of Applying Fertilizer on Rice

We conducted nitrogen and phosphorous. an experiment using the method of two factors and three levels of The results showed that there was a two days ahead in spikeformation stage in the three treatments of nitrogen, a two days ahead in spike-completion stage, and three was a premature of 3-5days. with the increasing application of fertilizers, the max tiller increases, and the tiller enhances. In the treatment of the phosphorous application, there was a higher tillering capacity. In the co-application of nitrogen and phosphorous, the number of green leaves increased, the plant body growth showed a flourish, the leaf was fleshy, all these made a basic for the growth of plant body. In the soil that had a higher yield, the effectiveness of nitrogen was comparatively higher, and the interaction of nitrogen and phosphorous was comparatively lower. In the soil that had a lower yield, the effectiveness of phosphorous was comparatively higher, and the interaction of nitrogen and phosphorous is also higher. So, in the soil that has a medium fertility, we must emphasize the co-application of nitrogen and phosphorous, only so, can we employ the interaction of nitrogen and phosphorous, and exert the yield increasing effect of nitrogen and phosphorous. When the soil production level changed from low to high, the ratio of nitrogen and phosphorous indicated a tendency of low to high. And a ratio of 0. 30-0.45 is proper.