川北地区氮肥不同施用量对饲草玉米生产性能的影响

Effect Forage Maize Production Performance on Different Fertilizer Levels in North of Sichuan

采用小区试验方法,在管理一致、播种密度一致的条件下,对科饲1号和玉草2号2个饲草玉米品种在追施纯氮300kg/hm2、375kg/hm2、450kg/hm2、525kg/hm2水平下的产草量进行了研究,结果表明:科饲1号的处理4产量最高,处理4和处理3产量差异不显著,但与处理2和处理1(对照)差异显著。玉草2号也是处理4产量最高,与处理3产量差异不显著,与处理1(对照)和处理2产量差异显著。从总体上来看,不同品种之间产量差异显著。饲草玉米各品种处理的经济效益不同,玉草2号处理3的经济效益最高,比经济效益最低的科饲1号处理1高260.6%;相同品种内不同处理中均以处理3经济效益最高,其次为处理4,最低为处理1(对照)。

District test method used in the management agreement,under the same seeding density,feeding on the kesi No 1 and yucao No 2 two forage maize varieties in the nitrogen 300kg/hm2,375 kg/hm2,450 kg/hm2,525 kg/hm2 level of grass production were studied.The results showed that：kesi No 1 of the treatment 4 had the highest yield,yield of treatment 4 and treatment 3 was not significant,but treatment 2 and treatment 1（control） were significantly different.Yucao No 2 of the treatment 4 had the highest yield also,yield of treatment 4 and treatment 3 was not significant,but yield of treatment 1（control） and treatment 2 were significantly different.On the whole,between the yield of different varieties were significantly different.Handle all varieties of forage maize in different economic,treatment 3 of Yucao No 2 most cost-effective,than subjects fed the lowest cost for treatment 1 of kesi No 1 260.6% higher;the same treatment in different species are most cost-effective treatment 3 ,followed by treatment 4,the lowest for the treatment 1（control）.