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王倩倩,尧水红,张 斌,岳龙凯,韩 亚,张月玲,周 璇.秸秆配施氮肥还田对水稻土酶活性的影响[J].土壤,2017,49(1):19-26. WANG Qianqian,YAO Shuihong,ZHANG Bin,YUE Longkai,HAN Ya,ZHANG Yueling,ZHOU Xuan.Effects of Rice Straw Returning Timing Combined with Nitrogen Fertilization on Enzyme Activities of Paddy Soil[J].Soils,2017,49(1):19-26 本文二维码信息
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秸秆配施氮肥还田对水稻土酶活性的影响
Effects of Rice Straw Returning Timing Combined with Nitrogen Fertilization on Enzyme Activities of Paddy Soil
投稿时间:2016-03-29  最后修改时间:2016-05-05
DOI:10.13758/j.cnki.tr.2017.01.004
中文关键词:  水稻土  秸秆还田时间  秸秆还田配施氮肥  酶活性
Key Words:Paddy soil  Straw returning timing  Straw returning combined with N fertilizer application  Enzyme activities
基金项目:国家自然科学基金项目 (41471187) 、国家重点研发项目(2016YFD0300907)和中国农业科学院知识创新工程优秀青年项目(634-6)资助。
作者单位E-mail
王倩倩 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室 wangqianqian127@163.com 
尧水红 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室 yaoshuihong@caas.cn 
张 斌 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室  
岳龙凯 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室  
韩 亚 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室  
张月玲 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室  
周 璇 中国农业科学院农业资源与农业区划研究所耕地培肥技术国家工程实验室  
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中文摘要:
      通过田间试验研究秸秆还田时间及配施氮肥比例对水稻土酶活性的影响,以期为培育水稻土肥力和稳定稻田生态系统功能提供理论依据。试验设置2个秸秆还田时间(WS,冬季还田;SS,春季还田)和4个氮肥配施量(N0,秸秆还田,试验期内全程不添加矿质氮;NB,常规施肥,还田时不添加矿质氮;N30B,秸秆还田时添加早稻基肥用量的30% 矿质氮;N60B,秸秆还田时添加早稻基肥用量的60% 矿质氮)。研究结果表明:①冬季秸秆翻耕还田能增加冬闲期6种与土壤碳周转相关酶(β-葡萄糖苷酶、β-纤维二糖苷酶、β-木糖苷酶、多酚氧化酶、过氧化物酶和蔗糖酶)的活性,冬闲期冬季秸秆还田条件下土壤酶活性均高于春季还田,生育期内冬季秸秆翻耕还田措施对土壤β-葡糖苷酶和过氧化物酶有增加作用;②秸秆还田并配施氮肥措施显著地增加冬闲期和生育期β-纤维二糖苷酶的活性,但配施氮肥的3个比例间土壤酶活性并无显著差异;③除多酚氧化酶外,其他5种酶均与其有机碳投入量呈显著正相关。因此,冬季秸秆还田及配施氮肥能在一定程度上调控与碳周转相关的土壤酶活性,对推广冬闲期秸秆翻耕还田及保障作物的产量具有重要的生态学意义。
Abstract:
      A field experiment was conducted to study the effects of straw returning timing combined with nitrogen (N) fertilizer application ratio on enzyme activities in paddy soil in order to provide theoretical basis for fostering soil fertility and stabilizing paddy field ecosystem function. The experiment consisted of two rice straw returning times (WS: returning in winter; SS: returning in spring) and four N fertilizer application levels (N0, straw returning and no N fertilization during all the course; NB, conventional fertilization, and no N fertilization when straw returning; N30B, 30% N of base fertilizer applied when straw returning; N60B, 60% N of base fertilizer applied when straw returning). The results showed that: 1) Straw returning in winter increased the activities of six soil enzymes (β-Glucosidase, β-Cellobiosidase, β-Xylosidase, Phenol oxidase, Peroxidase and Invertase) related to C turnover. In winter fallow period, enzyme activities were higher at winter straw returning than those at spring straw returning, and winter straw returning increased both the activities of β-Glucosidase and Peroxidase during early-rice growth stage. 2) Rice straw returning combined with N fertilization application significantly increased β-cellobiosidase activity both in winter fallow period and in early-rice growth stage, but there was no significant difference in soil enzyme activities under the three levels of N fertilizer application. 3) All the enzyme activities, except Phenol oxidase, had significantly positive correlations with organic C inputs. Therefore, rice straw returning combined with N fertilizer application in winter can regulate soil enzyme activities related to C turnover to some extent, which has ecological significance to promoting straw returning in winter and ensuring the crop yield.
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