Effects of Fertilization on Yield and Quality of Leymus chinensis Cultivated Grassland
The effects of applying N time (turning green,jointing and booting) and N levels (0 kg/ hm2,60 kg/hm2,90 kg/hm2,120 kg/hm2) on the yield and quality of Leymus chinensis Nongjing No.4 cultivated grassland were studied.The results showed that:nitrogen effectively increased the hay yield of Leymus chinensis Nongjing No.4.Applying nitrogen in turning green period (A1) had the best effect on increasing yield compared with the other two periods (A2 & A3),and the hay yield was the largest (20488.9 kg/hm2) when the applying nitrogen rate was 120 kg/hm2 (N3);applying nitrogen at rate of 60kg/hm2(N1) in the heading period(A3)had the best effect on increasing yield (62.8 kg/kg).Nitrogen could increase the crude protein (CP) content,but reduced crude fiber (CF),acid detergent fiber (ADF) and neutral detergent fiber (NDF) content.The crude fiber (CF) was the lowest when the nitrogen was applied at the rate of 90 kg/hm2 (N2) in early jointing period(A2).The crude protein (CP) were significantly higher when applying nitrogen rate was beyond 90 kg/hm2 (N2) than unfertilized (N0).Applying nitrogen at rate of 120 kg/hm2 in turning green period had higher yield,and applying nitrogen at the rate of 90 kg/hm2 in jointing period had a higher quality of Leymus chinensis.
Leymus chinensisApplying N timeN levelsYieldQuality
NETL
NSTL
万方数据
维普
