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草业学报  2010 

紫花苜蓿建植期四种刈割频次下的产量、品质及再生性研究

, PP. 134-142

Keywords: 紫花苜蓿,刈割频次,再生性,持久性

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Abstract:

收获制度是苜蓿生产管理的关键环节。为明确不同刈割制度下建植期苜蓿生长规律,本研究利用盆栽试验,通过人工控制苜蓿生长温度、水肥条件,完善测定指标体系,进行苜蓿刈割频次的研究,分析连续生产情况下不同收获制度对不同类型苜蓿建植期产量、品质、再生能力及持续生产力的影响。研究结果表明,高频刈割会显著降低苜蓿的生产力和持久性。连续高频刈割后延长收获间隔可以恢复苜蓿茎密度和再生能力,但不能恢复到适宜刈割频次的水平。不同品种间生育期、耐刈性与再生性、产量分布以及营养价值存在显著差异,并导致相同收获频次下饲草产量、饲草品质以及持续生产力的差异。在建植期及低龄草地,维克多(Vector)和得龙(Durango)2个国外引进品种适于间隔为25~35d高频度刈割;我国东北地区育成低休眠级苜蓿品种公农1号适于间隔为35~45d的刈割频度。

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