不同氮效率型紫花苜蓿的生产性能

Production performance of different nitrogen efficiency types of alfalfa

摘要:

【目的】 探讨不同氮效率类型紫花苜蓿的生产性能差异。【方法】 采用二因素（紫花苜蓿品种、 氮水平）裂区试验设计，设4个不同氮效率类型的8个紫花苜蓿品种（LW6010、甘农5号、新牧1号、陇东苜蓿、甘农3号、甘农7号、金皇后和龙牧801）和2个氮素水平（0和103.5 kg/hm2），测定紫花苜蓿品种的产量、粗蛋白含量、蛋白总量、ADF、NDF及RFV。【结果】 施氮时，氮高效型LW6010、甘农5号和氮常效型新牧1号、甘农3号的产量、粗蛋白含量、蛋白总量及RFV高于氮反效型甘农7号、龙牧801和氮低效型品种陇东苜蓿、金皇后；不施氮时，氮高效型LW6010、甘农5号和氮反效型甘农7号、龙牧801的产量、粗蛋白含量、蛋白总量及RFV高于氮常效型新牧1号、甘农3号和氮低效型陇东苜蓿、金皇后。 【结论】 氮高效型紫花苜蓿品种LW6010和甘农5号的生产性能优于氮低效型紫花苜蓿品种陇东苜蓿和金皇后，氮常效型新牧1号、甘农3号和氮反效型甘农7号、龙牧801则介于前二者之间。

Abstract:

【Objective】 This study aims to explore the differences in production performance among alfalfa varieties with different nitrogen efficiency types.【Method】 A two-factor experimental design was used，with alfalfa variety and nitrogen level as the factors. Eight alfalfa varieties （LW6010，Gannong 5，Xinmu 1，Longdong alfalfa，Gannong 3， Gannong 7，Golden Queen，and Longmu 801） with four different nitrogen efficiency types were evaluated under two nitrogen levels （0 and 103. 5 kg/hm2）. The yield，crude protein content，total protein content，ADF，NDF，and RFV were studied.【Result】 The results showed that when nitrogen was applied，the yield，crude protein content，total protein content，and RFV of nitrogen efficient types （LW6010，Gannong 5） and nitrogen-constant effective types （Xinmu 1，Gannong 3） were higher compared to those of nitrogen-counter-effective varieties （Gannong 7，Longmu 801），and nitrogen inefficient types （Longdong alfalfa，Golden Queen）； Without nitrogen application，of nitrogen efficient varieties （LW6010，Gannong 5），and nitrogen-counter-effective varieties （Gannong 7，and Longmu 801） also performed better in yield，crude protein content，total protein content，and RFV then the nitrogen normal effective （Xinmu 1，Gannong 3），and nitrogen inefficient （Longdong Alfalfa，and Jinhuanghou）.【Conclusion】 In summary， the nitrogen efficient alfalfa varieties LW6010 and Gannong 5 are exhibited superior performance compared to the nitrogen inefficient varieties Longdong alfalfa and Golden Queen. The itrogen-regular-effective alfalfa（Xinmu 1，Gan- nong 3），and the nitrogen-counter-effective alfalfa （Gannong 7 and Longmu 801） displayed intermediate performance.