| 刈割强度对不同根型苜蓿营养器官化学计量特征的影响 |
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| 引用本文： | 李冰月,南丽丽,温素军,陈洁,朱海花,张亚楠.刈割强度对不同根型苜蓿营养器官化学计量特征的影响[J].中国草地学报,2022(1):114-120. |
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| 作者姓名： | 李冰月 南丽丽 温素军 陈洁 朱海花 张亚楠 |
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| 作者单位： | 甘肃农业大学草业学院/草业生态系统教育部重点实验室 |
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| 基金项目： | 国家自然科学地区基金(31460630);省部共建草业生态系统教育部重点实验室暨草学甘肃省优势特色学科建设(GAU-XKJS-2018-013)项目共同资助。 |
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| 摘 要： | 刈割对苜蓿的生长、形态、生理特征及植被更新有显著影响.以根茎型、直根型、根蘖型苜蓿为研究对象,分别设置距离上次刈割恢复生长为20、27、34、41d的4个刈割强度,研究了刈割强度对各根型苜蓿叶、茎、根器官氮、磷、钾化学计量特征的影响.结果 表明:不同刈割强度下各根型苜蓿叶、茎、根器官氮、磷、钾含量及氮磷比存在显著差异....
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| 关 键 词： | 苜蓿 根型 刈割强度 化学计量特征 |
Effects of Mowing Frequency on Stoichiometric Characteristics of Vegetative Organs of Alfalfa with Different Root Types |
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| LI Bing-yue,NAN Li-li,WEN Su-jun,CHEN Jie,ZHU Hai-hua,ZHANG Ya-nan.Effects of Mowing Frequency on Stoichiometric Characteristics of Vegetative Organs of Alfalfa with Different Root Types[J].Chinese Journal of Grassland,2022(1):114-120. |
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| Authors: | LI Bing-yue NAN Li-li WEN Su-jun CHEN Jie ZHU Hai-hua ZHANG Ya-nan |
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| Institution: | (Pratacultural College,Gansu Agricultural University/Key Laboratory of Grassland Ecosystem,Ministry of Education,Lanzhou 730070,China) |
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| Abstract: | The mowing has a significant effect on the growth,morphology,physiological characteristics and vegetation regeneration of alfalfa.The effects of mowing frequency on stoichiometric characteristics of nitrogen(N),phosphorus(P),and potassium(K)in roots,stems and leaves of alfalfa with different root types(rhizomatous root,taproot,and creeping root)were explored by setting four different mowing frequencies(the recovery time of 20,27,34,41 d from the last mowing).The results showed that there were significant differences in the contents of N,P,K and N∶P in leaves,stems,and roots of alfalfa with three root types under different mowing frequencies.The content of N and N∶P in roots were the highest,the content of P in leaves was the highest,and the content of K in roots was the highest.The contents of N,P and K in leaves,stems,and roots of alfalfa with different root types were higher in September than in June.The cross analysis of the effects of different mowing frequencies,growth stages and vegetative organs on the contents of N,P,K and N∶P of alfalfa with different root types revealed that the contents of N,P and K of alfalfa were affected by plant organs and growth stages,while the N∶P was mainly affected by plant organs. |
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| Keywords: | Alfalfa Root-type Mowing frequency Stoichiometric characteristics |
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