不同耕作措施对春小麦生育期内土壤酶活性的影响

发布时间：2018-02-02 09:47

本文关键词： 耕作措施春小麦土壤水解酶土壤氧化还原酶　出处：《干旱区资源与环境》2016年10期 　论文类型：期刊论文

【摘要】：通过设置在陇中黄土高原半干旱雨养农业区连续15年的保护性耕作长期定位试验,研究了传统耕作(T)、免耕(NT)、免耕结合秸秆覆盖(NTS)、传统耕作结合秸秆还田(TS)4种不同耕作措施下土壤蔗糖酶、淀粉酶、纤维素酶、过氧化物酶和脱氢酶在春小麦不同生育期的动态变化。结果表明:1)整个生育期0-30cm土层中,与T处理相比,NTS处理可以显著提高土壤蔗糖酶、淀粉酶、纤维素酶、过氧化物酶、脱氢酶活性,在整个生育期分别增加了45.28%、60.05%、42.86%、23.75%、31.79%;NT与TS对其表现出不同的阶段性效应。2)相关分析表明五种酶活性除蔗糖酶与过氧化物酶外,均达到极显著正相关。3)生育期与耕作措施对土壤酶活性的影响不同,其中生育期对上述研究的5种酶活性影响极显著,耕作措施对土壤蔗糖酶、淀粉酶、纤维素酶和脱氢酶影响极显著,二者交互作用对土壤淀粉酶、过氧化物酶及脱氢酶影响极显著。
[Abstract]:Based on the long-term location experiment of conservation tillage in the semi-arid rain-fed agricultural area of Longzhong Loess Plateau for 15 years, this paper studied the traditional tillage (TX), no-tillage (NTN), no-tillage combined with straw mulch (NTS). Soil sucrose, amylase and cellulase were treated by traditional tillage and straw returning to the field with four different tillage methods. The dynamic changes of peroxidase and dehydrogenase in different growth stages of spring wheat. The results showed that in 0-30cm soil layer during the whole growth period, NTS treatment could significantly improve soil sucrose enzyme compared with T treatment. The activities of amylase, cellulase, peroxidase and dehydrogenase increased by 45.28 and 42.86 respectively during the whole growth period. The correlation analysis of NT and TS showed that there were five enzymes except sucrase and peroxidase. The effect of growth period on soil enzyme activity was different from that of tillage measure. Among them, the effect of growth period on soil enzyme activity was very significant, and tillage measure on soil sucrose enzyme and amylase. The effects of cellulase and dehydrogenase on soil amylase, peroxidase and dehydrogenase were significant.
【作者单位】：甘肃农业大学甘肃省干旱生境作物学重点实验室;甘肃农业大学资源与环境学院;甘肃省节水农业工程技术研究中心;
【基金】：国家自然基金项目(31160269,31571594) "十二·五"循环农业科技工程(2012BAD14B03) 甘肃省干旱生境作物学重点实验室-省部共建国家重点实验室培育基地开放基金课题(GSCS-2013-13)资助
【分类号】：S154.2;S512.12
【正文快照】： 土壤酶是土壤生态系统中最活跃的部分,是微生物生态功能的重要体现,是连接土壤有机-无机-生物相互作用的重要推动者,强力推动土壤生物的代谢过程及其适应外部环境和维持植物生长条件的能力[1-4]。可以作为土壤肥力及土壤质量改变的早期预测指标,土壤中所进行的生化过程及其功

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