播期对不同类型青贮玉米产量和品质的影响

Effects of Sowing Dates on Yield and Quality of Different Silage Corns

为确定青贮玉米最佳播种时期,促进青贮玉米的应用推广,本研究对3份不同类型青贮玉米杂交品种在4个播种时期的鲜物质产量和干物质产量以及秸秆品质性状进行分析。结果表明:晚播的青贮玉米生物产量、干物质产量、全株粗淀粉含量、中性洗涤纤维(NDF)含量、体外48 h干物质消化率、体外48 h NDF消化率、总可消化养分和每吨干物质产奶量均明显低于早播和正常播种。说明青贮玉米适当早播可以获得较高的产量和较好的秸秆营养品质。

In order to determine the best sowing time of silage corn and promote the application and popularization of silage corn,the biological yield,dry matter yield and straw quality characters of three different types of silage corn hybrids in four sowing periods were carried out.The results showed that,the biological yield,dry matter yield,whole plant crude starch content,neutral detergent fiber content,in vitro 48 h dry matter digestibility,in vitro 48 h NDF digestibility,total digestible nutrients and milk yield of dry matter of late sowing silage corn were significantly lower than those of early sowing and normal sowing.Proper early sowing of silage corn can obtain higher yield and better straw nutritional quality.