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本文初步研究了不同氮肥、磷肥水平对多年生黑麦草物质积累的动态过程、饲草产量及其营养成分的影响。结果表明:多年生黑麦草干物质积累存在两个高峰,即秋季和春季。增施氮肥或磷肥干物质积累明显增加,且存在NXPE互作效应。干物质积累与叶面积消长呈极显著的正相关(r=0.9900),其线性回归方程为: y=-0.8731+0.807781x增施氮、磷肥还显著地增加了饲草产量,平均每施1公斤纯氮或纯磷增产干草分别为11.3、21.7公斤。施氮可增加饲草中CP含量,降低CF及P含量;施磷则增加饲草中P含量,但CF也略有加增。
In this paper, the effects of different N and P fertilizers on the dynamic process of perennial ryegrass accumulation, forage yield and its nutritional components were studied. The results showed that there were two peaks in perennial ryegrass dry matter accumulation, ie, autumn and spring. The accumulation of N or P increased obviously, and the interaction effect of NXPE existed. There was a significant positive correlation between dry matter accumulation and leaf area growth (r = 0.9900). The linear regression equation was: y = -0.8731 + 0.807781x Nitrogen supplementation also significantly increased forage yield, with an average of 1 Kg of pure nitrogen or pure phosphorus increased hay were 11.3,21.7 kg. Nitrogen application increased the content of CP in forage grass and decreased the contents of CF and P; while phosphorus increased the P content in forage grass, but CF also slightly increased.