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中文摘要：
对比分析了陕西渭北旱塬苹果园免耕、翻耕和旋耕3种耕作措施结合玉米秸秆、地膜及生草覆盖对苹果园0～40cm土壤过氧化氢酶、蔗糖酶及脲酶活性的影响,结果表明：各处理土壤3种酶活性均达到显著差异（P〈0.05）,采用土壤耕作和覆盖均能提高果园土壤酶活性;而耕作和覆盖相结合可更有效地提高果园土壤过氧化氢酶、蔗糖酶及脲酶的活性,以翻耕＋秸秆覆盖效果最好,3种酶活性分别较对照（翻耕无覆盖）高13.82%、27.41%和363.26%;不同土层土壤酶活性的大小也存在差异,其中蔗糖酶和脲酶活性随土层加深均有所降低,而过氧化氢酶活性则呈升高趋势。因而,在渭北旱塬苹果生产基地,采用翻耕＋秸秆覆盖技术将对提高土壤酶活性及改善土壤微环境起重要作用。
英文摘要：
To study the effect of different tillage and mulching measures on enzyme activities of apple orchard soil in Weibei Plateau, Shaanxi Province, three conservation tillage managements of no tillage, moldboard plowing and rotary tillage under corn straw mulching, plastic film mulching and growing grass were analyzed and compared with each other. Results showed that the activities of catalase, sucrase, urease were significantly different between these different treatments （P 〈 0. 05 ）, tillage practice combined with mulching could increase the enzyme activities of soil; But the combination of tillage and mulching could effectively increase three enzyme activities. In all treatments, moldboard plowing combined with stubble mulch had the best effect, and three enzyme activities under the moldboard plowing combined with stubble mulch treatment increased by 13.82%, 27.41% and 363.26% compared to the control （moldboard plowing with no mulching） ; But in different soil layers, the enzyme activities were different, the activities of sucrase and urease decreased with depth while catalase activity increased. So moldboard plowing combined with stubble mulch can increase the enzyme activities of soil and improve the micro-surroundings of the soil in Weibei Plateau.
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