草地学报 ›› 2026, Vol. 34 ›› Issue (7): 2472-2482.DOI: 10.11733/j.issn.1007-0435.2026.07.012
• 研究论文 • 上一篇
刘晓阳, 葛美娇, 李紫微, 海昕伟, 贾晨雪, 高凯
收稿日期:2025-12-05
修回日期:2026-02-03
发布日期:2026-07-02
通讯作者:
高凯,E-mail:gaokai555@126.com
作者简介:刘晓阳(2000-),男,汉族,河南濮阳人,硕士研究生,主要从事饲草高产栽培与利用研究,E-mail:lenovo-20210303@hotmail.com
基金资助:LIU Xiao-yan, GE Mei-jiao, LI Zi-wei, HAI Xin-wei, JIA Chen-xue, GAO Kai
Received:2025-12-05
Revised:2026-02-03
Published:2026-07-02
摘要: 刈割和施肥通过对苜蓿养分重吸收生理过程的干扰,可优化其生长季内系统养分的转移和储备,为研究其对紫花苜蓿叶片养分重吸收的差异性,寻找植株养分收支平衡点。本试验以不同刈割(3次·年-1和4次·年-1,记为M1和M2)和施肥(P2O5和K2O为3∶5的比例设置5个施肥梯度,记为CK、F1、F2、F3、F4)处理条件下紫花苜蓿叶片为研究对象,测定成熟叶片和衰老叶片的碳、氮、磷含量,分析其氮磷重吸收效率的特征。结果表明:在刈割和施肥处理下显著提高叶片的氮磷含量(P<0.05);叶片碳氮比和碳磷比整体呈下降趋势,氮磷比呈先升高后下降的趋势且均大于16;叶片的氮磷重吸收效率分别为25.08%~42.79%、29.05%~44.30%;氮磷重吸收效率与新叶的碳氮磷呈显著正相关性。刈割促进氮磷重吸收,施肥则先促进后抑制,M2F2的成熟叶碳氮含量和衰老叶氮磷重吸收效率最高,此时紫花苜蓿的养分获取策略最佳。
中图分类号:
刘晓阳, 葛美娇, 李紫微, 海昕伟, 贾晨雪, 高凯. 刈割和施肥对紫花苜蓿叶片氮磷重吸收效率的影响[J]. 草地学报, 2026, 34(7): 2472-2482.
LIU Xiao-yan, GE Mei-jiao, LI Zi-wei, HAI Xin-wei, JIA Chen-xue, GAO Kai. Effects of Mowing and Fertilization on Nitrogen and Phosphorus Reabsorption Efficiency in Alfalfa Leaves[J]. Acta Agrestia Sinica, 2026, 34(7): 2472-2482.
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