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水肥处理对黄瓜土壤养分、酶及微生物多样性的影响

韦泽秀1;梁银丽1,2;井上光弘3;周茂娟1;黄茂林1;古建锋1;吴燕1   

  1. 1西北农林科技大学资源环境学院, 陕西杨凌 712100;2中国科学院/水利部水土保持研究所, 陕西杨凌 712100;3日本鸟取大学干燥地研究中心, 日本鸟取 680-0001
  • 收稿日期:2008-12-09 修回日期:1900-01-01 出版日期:2009-07-20 发布日期:2009-07-20

Effects of different water and fertilizer supply on cucumber soil nutrient content, enzyme activity, and microbial diversity.

WEI Ze-xiu1;LIANG Yin-li1,2;INOUE Mitsuhiro3; ZHOU Mao-juan1;HUANG Mao-lin1;GU Jian-feng1;WU Yan1   

  1. 1College of Resource and Environment, Northwest A & F University, Yangling 712100, Shaanxi, China;2Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China;3Arid Land Research Center, Tottori University, Tottori, 680-0001, Japan
  • Received:2008-12-09 Revised:1900-01-01 Online:2009-07-20 Published:2009-07-20

摘要: 以津优1号黄瓜为试材,设3个土壤相对含水量水平(50%~60%、70%~80%、90%~100%)和2个肥料追施量(600 kg N·hm-2和420 kg P2O5·hm-2,420 kg N·hm-2和294 kg P2O5·hm-2)处理,研究了不同水肥供应对日光温室黄瓜土壤养分、酶活性及微生物多样性的影响.结果表明:土壤中NH4+-N含量随施肥量的增加而提高,随土壤相对含水量的增加而降低;水肥供给的增加有利于提高土壤中速效磷含量和蔗糖酶活性;肥料增加使土壤中蛋白酶活性降低,而水分降低使土壤中脲酶活性提高.土壤中微生物多样性与土壤中养分含量无显著相关性,与土壤脲酶活性呈显著正相关,与蔗糖酶活性呈显著负相关.土壤相对含水量70%~80%、氮肥追施量600 kg N·hm-2和420 kg P2O5·hm-2处理的土壤养分含量、蔗糖酶、磷酸酶和脲酶活性较高,且土壤中微生物多样性和均匀度显著高于其他处理,土壤生产潜力最优.

关键词: 杨树人工林, 离子交换树脂膜, 养分有效性, 土壤酶活性, 典型相关分析

Abstract: With cucumber (Cucumis sativus L.) variety Jinyou 1 as test material, a greenhouse experiment was conducted to study the effects of different water an d fertilizer supply on the cucumber soil nutrient content, enzyme activity, and microbial diversity. Three water regimes (50%〖KG-*2〗-〖KG-*7〗60%, 70%〖KG-*2 〗-〖KG-*7〗80%, and 90%〖KG-*2〗-〖KG-*7〗100% soil relative moisture content) and two fertilization practices (600 kg N·hm-2 + 420 kg P2O5·hm-2 and 420 kg N·hm-2+294 kg P2O5·hm-2) wer e designed. The increase of water and fertilizer supply benefited the increase o f soil available P content and sucrase activity. Increasing fertilization rate i ncreased soil NH4+-N content but decreased soil protease activity, and incr easing soil relative moisture content decreased the soil NH4+-N content and urease activity. Soil microbial diversity had no significant correlations with soil nutrient contents, but significantly positively correlated with soil urease activity and negatively correlated with soil sucrase activity. Among the treatm ents, the treatment 70%〖KG-*2〗-〖KG-*7〗80% soil relative moisture content + 6 00 kg N·hm-2 and 420 kg P2O5·hm-2 had the highest soil nutrien t contents, soil urease, sucrase, and phosphatase activities, and soil microbial diversity and evenness, being the best in soil potential productivity.

Key words: poplar plantation, ion exchange resin membrane, nutrient availability, soil enzyme activity, canonical correlation analysis.