油莎豆播种期密度耦合对土壤酶活性的影响

doi:10.12190/j.issn.2096-1197.2022.01.04

摘要/Abstract

摘要： 【目的】探究内蒙古中部地区油莎豆播种期密度耦合下土壤酶活性的变化规律。【方法】采用裂区区组设计,设置播种期为主处理（S1：4月30日、S2：5月10日、S3：5月20日、S4：5月30日）,密度为副处理（D1：6万株/hm²、D2：9万株/hm²、D3：12万株/hm²、D4：15万株/hm²）,共16个处理,分别测产并分析不同处理下土壤脲酶活性、过氧化氢酶活性、碱性磷酸酶活性、蔗糖酶活性的变化趋势。【结果】S1、S2、S3播种期下,土壤酶活性随着密度的增加逐渐升高;相同密度下,除脲酶活性外,其他土壤酶活性随着播种期的推后呈现先升高后降低的趋势,且不同酶活性分布趋势略有差异。播种期密度耦合下,S4D4的土壤脲酶活性最大,为9.81 mg/（g·24 h）;S3D4的土壤过氧化氢酶活性最大,为38.20 mg/（g·24 h）;S3D4的土壤碱性磷酸酶活性显著高于其他处理（P<0.05）,为0.45 mg/（g·24 h）;S3D4的土壤蔗糖酶活性最大,为52.02 mg/（g·24 h）。油莎豆产量在相同播种期下随着密度的增加而升高,在相同密度下随着播种期的推后呈现先升高后降低的趋势;S3D4的产量显著高于其他处理（P<0.05）,为16 333.42 kg/hm²。【结论】在内蒙古中部地区,油莎豆的播种期为5月20日、密度为15万株/hm²时,土壤酶活性最高,油莎豆产量显著增加。

关键词: 油莎豆, 播种期, 密度, 土壤酶活性

Abstract: 【Objective】To investigate the changing of soil enzyme activity in central Inner Mongolia when density-sowing date coupling of Cyperus esculentus.【Methods】The experiment was carried out with a split plot group design. With a total of 16 treatments,the primary treatment was sowing date（S1：April 30,S2：May 10,S3：May 20,S4：May 30）,while the secondary treatment was density（D1：60 000 plants/hm²,D2：90 000 plants/hm²,D3：120 000 plants/hm²,D4：150 000 plants/hm²）. The yields of the 16 treatments,as well as the changes of soil urease,catalase,alkaline phosphatase and sucrase activity were all analyzed.【Results】Soil enzyme activities increased gradually with increasing density under S1,S2,S3 sowing date. Under the same density,other soil enzyme activities,except urease activity,increased first and then decreased with the delay of sowing date,and the distribution trend of different enzyme activities was slightly different. Under the density-sowing date coupling,soil urease activity peaked at 9.81 mg/（g·24 h）in S4D4. S3D4 had the highest soil catalase activity of 38.20 mg/（g·24 h）and the highest soil sucrase activity of 52.02 mg/（g·24 h）. S3D4 had significantly higher（P<0.05）soil alkaline phosphatase activity than the other treatments,which was 0.45 mg/（g·24 h）. The yield of Cyperus esculentus increased as density grew at the same sowing date,and increased first,then reduced if the sowing date was delayed at the same density. The yield of S3D4 was 16 333.42 kg/hm²,which was significantly higher（P<0.05）than the yield of the other treatments.【Conclusion】When Cyperus esculentus was sown on May 20 in central Inner Mongolia at a density of 150 000 plants/hm²,the soil enzyme activity was at its peak,and the yield increased dramatically.

Key words: Cyperus esculentus, Sowing date, Planting density, Soil enzyme activities

中图分类号:

S565

董琦, 曹秭琦, 张向前, 任永峰, 侯智惠, 慕宗杰, 赵小庆, 路战远. 油莎豆播种期密度耦合对土壤酶活性的影响[J]. 北方农业学报, 2022, 50(1): 25-32.

DONG Qi, CAO Ziqi, ZHANG Xiangqian, REN Yongfeng, HOU Zhihui, MU Zhongjie, ZHAO Xiaoqing, LU Zhanyuan. Effects of density-sowing date coupling of Cyperus esculeutus on soil enzyme activities[J]. Journal of Northern Agriculture, 2022, 50(1): 25-32.

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