磷肥对滴灌苜蓿根际土壤微环境及干草产量的影响

doi:10.11733/j.issn.1007-0435.2022.02.030

草地学报 ›› 2022, Vol. 30 ›› Issue (2): 495-502.DOI: 10.11733/j.issn.1007-0435.2022.02.030

• 技术研发 • 上一篇

磷肥对滴灌苜蓿根际土壤微环境及干草产量的影响

李生仪, 孙延亮, 刘选帅, 赵俊威, 赵建涛, 马春晖, 张前兵

石河子大学动物科技学院, 新疆石河子 832003

收稿日期:2021-09-30 修回日期:2021-11-05 发布日期:2022-03-10
通讯作者: 张前兵,E-mail:qbz102@163.com
作者简介:李生仪(1998-),男,汉族,新疆伊犁人,硕士研究生,主要从事牧草生产与加工研究,E-mail:591156410@qq.com
基金资助:
国家自然科学基金项目(32001400)；霍英东青年教师基金(171099)；兵团科技创新骨干人才计划项目(2021BC034)；国家现代农业产业技术体系资助

Effects of Phosphate Fertilizer on Rhizosphere Soil Microenvironment and Hay Yield of Alfalfa under Drip Irrigation

LI Sheng-yi, SUN Yan-liang, LIU Xuan-shuai, ZHAO Jun-wei, ZHAO Jian-tao, MA Chun-hui, ZHANG Qian-bing

College of Animal Science and Technology, Shihezi University, Shihezi, Xinjiang 832003, China

Received:2021-09-30 Revised:2021-11-05 Published:2022-03-10

摘要/Abstract

摘要： 为探究不同施磷量对滴灌紫花苜蓿根际土壤微环境及干草产量的影响，试验设置4个施磷(P₂O₅)梯度：0(P₀)，50(P₁)，100(P₂)和150 kg·hm^-2(P₃)，采用滴灌模式随水滴施，测定紫花苜蓿根际土壤微生物数量、酶活性、土壤理化性质及干草产量，并进行综合分析。结果表明，紫花苜蓿根际土壤真菌、放线菌数量及脲酶、过氧化氢酶活性在P₂处理下达到最大值，分别为6.04，6.15 lg cfu·g^-1及933.54，945.91 U·g^-1·d^-1；细菌数量在P₃处理达到最大值，为7.14 lg cfu·g^-1；碱性磷酸酶活性在P₁处理达到最大值，为14 939.80 U·g^-1·d^-1。根际土壤全磷及有效磷含量随着施磷量的增加呈逐渐增加的趋势，至P₃处理达到最大值，但根际土壤pH及含水率均为未施磷显著高于其他处理(P<0.05)。苜蓿干草产量在P₂处理达到最大值，为21.82 t·hm^-2。综合评定，适宜的施磷量(100 kg·hm^-2)有利于改善紫花苜蓿根际土壤微环境，进而提高苜蓿干草产量。

关键词: 苜蓿, 施磷量, 根际土壤, 微环境, 干草产量

Abstract: To explore the effects of different phosphorus application rates on rhizosphere soil microenvironment and hay yield of alfalfa under drip irrigation. Four phosphorus (P₂O₅) gradients were set up：0(P₀),50(P₁),100(P₂) and 150 kg·hm^-2(P₃). Fertilization was applied with drip irrigation mode. The number of microorganisms,enzyme activity,soil physicochemical properties in alfalfa rhizosphere soil and hay yield were determined and analyzed comprehensively. The results showed that the number of fungi and actinomycetes and the activities of urease and catalase in rhizosphere soil of alfalfa reached the maximum under P₂ treatment,which were 6.04,6.15 lg cfu·g^-1 and 933.54,945.91 U·g^-1·d^-1,respectively. The number of bacteria reached the maximum value of 7.14 lg cfu·g^-1 under P₃ treatment;alkaline phosphatase activity reached the maximum at 14 939.80 U·g^-1·d^-1 under P₁ treatment. The total phosphorus and available phosphorus contents in rhizosphere soil gradually increased with the increase of phosphorus application rate,and reached the maximum value in P₃ treatment. However,the pH value and water content in rhizosphere soil without phosphorus application were significantly higher than those in other treatments (P<0.05). The hay yield of alfalfa reached the maximum in P₂ treatment,which was 21.82 t·hm^-2. Through a comprehensive evaluation,when the phosphorus application rate was 100 kg·hm^-2,it was beneficial to improve alfalfa rhizosphere soil microenvironment,thereby increasing alfalfa hay yield.

Key words: Alfalfa, Phosphorus application, Rhizosphere soil, Microenvironment, Hay yield

中图分类号:

S541

李生仪, 孙延亮, 刘选帅, 赵俊威, 赵建涛, 马春晖, 张前兵. 磷肥对滴灌苜蓿根际土壤微环境及干草产量的影响[J]. 草地学报, 2022, 30(2): 495-502.

LI Sheng-yi, SUN Yan-liang, LIU Xuan-shuai, ZHAO Jun-wei, ZHAO Jian-tao, MA Chun-hui, ZHANG Qian-bing. Effects of Phosphate Fertilizer on Rhizosphere Soil Microenvironment and Hay Yield of Alfalfa under Drip Irrigation[J]. Acta Agrestia Sinica, 2022, 30(2): 495-502.

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磷肥对滴灌苜蓿根际土壤微环境及干草产量的影响

Effects of Phosphate Fertilizer on Rhizosphere Soil Microenvironment and Hay Yield of Alfalfa under Drip Irrigation

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