氮肥水平对紫花苜蓿农艺性状及经济效益的影响

doi:10.12190/j.issn.2096-1197.2021.05.18

Abstract

Abstract: 【Objective】 To find out the appropriate nitrogen fertilizer amount for local alfalfa planting in Togtoh County in Hohhot. 【Methods】 The agronomic traits of alfalfa under different nitrogen fertilizer levels were studied for 4 consecutive years and the economic benefit analysis was conducted based on the long-term positioning experiment using alfalfa as material with a single factor completely randomized trial design. 【Results】 The average plant height of all nitrogen treatments was higher than the control. The nitrogen fertilizer 120.00 kg/hm² had the highest average plant height（126.93 cm）. Compared with the control,the nitrogen fertilizer treatment plants had lower stem and leaf rate（1.13）. The dry-to-fresh ratio of alfalfa droped as the nitrogen application rate increased,while the dry-to-fresh ratio of the control was relatively higher（0.37）;the alfalfa hay yield reached its peak in the third year. The nitrogen fertilizer 120.00 kg/hm² had the highest total hay yield in the 4 years（96 509.24 kg/hm²）,which was 36 150.16 kg/hm² more than the control,with an enconormic yield of 74 400 yuan/hm² higher. 【Conclusion】 Nitrogen application significantly increased the plant height,hay yield and net income of alfalfa while decreasing the stem-leaf ratio. The treatment of 120.00 kg/hm² nitrogen fertilizer was the best nitrogen application rate for alfalfa planting in Togtoh County in Hohhot.

Key words: Nitrogen fertilizer, Alfalfa, Agronomic traits, Hay yield, Economic benefit

CLC Number:

S541.9

JI Chao, YIN Guomei, LIU Sibo, MU Zongjie, XUE Yanlin, LI Jingzhong, MA Chunmei, ZHANG Ying, YANG Fenglan, LIANG Yewen. Effect of nitrogen levels on alfalfa agronomic traits and economic benefit[J].Journal of Northern Agriculture, 2021, 49(5): 127-134.

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URL: https://journal30.magtechjournal.com/bfnyxb/EN/10.12190/j.issn.2096-1197.2021.05.18

https://journal30.magtechjournal.com/bfnyxb/EN/Y2021/V49/I5/127

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Effect of nitrogen levels on alfalfa agronomic traits and economic benefit

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