摘要
对饲用玉米在不同生育期、不同施肥量的生产性能以及主要营养物质变化情况进行研究。试验结果表明:①经过物候期观测,东陵白和中原单32为早熟品种,而科多8号、科青1号、科多4号为晚熟品种。各品种的鲜体产量差异显著(P<0.05),依次顺序为科多4号>科多8号>科青1号>东陵白>中原单32。②不同施肥水平对各品种间产量差异显著(P<0.05),450kg/hm2和300kg/hm2的氮肥施肥水平与150kg/hm2和0kg/hm2(对照组)差异显著。茎叶比的变化显著,以中原单32和东陵白变化幅度较大,与其它3个品种差异显著。③随着生育期的推进,各品种的CP、Ca、P、CA含量显著下降(P<0.05),NDF、ADF、OM含量则显著上升(P<0.05)。各品种在同一生育期内营养物质含量差异不显著。
The result showed as follows: ① According to observation of phenophase Dong Lingbai and Zhongyuandan NO.32 was premature cultivar ,on the contrary ,Keduo NO.8,Keqing NO.1,Keduo NO.4 were postmature cultivar.The fresh yield of every cultivar was obviously different (P<0.05).The Keduo NO.4 had the largest fresh yield .Then Keduo NO.8,The next was Keqing NO.1,the smaller two was Dong ingbai and Zhongyuandan NO.32. ② The variety level of fertilization was obviously different (P<0.05),450kg/hm 2N and 300kg/hm 2N level had obviously higher than 150kg/hm 2N and 0kg/hm 2N.The change of sterm leaf ratio was evident in Zhongyuandan NO.32 and Donglingbai compared with the other three species .③ With the postmergence postponed,the content of crude protein (cp),Ca,P and CA in cultivar of forage maize dropped,While ADF,NDF and OM increased significantly.The nutrition value in every cultivar was not clearly different in the same period.
出处
《中国草食动物》
CAS
2005年第4期39-42,共4页
China Herbivores
