| 陈军,王立光,叶春雷,李进京,欧巧明,罗俊杰.耕作制度对胡麻土壤酶活性的影响[J].干旱地区农业研究,2019,37(3):177~184 |
| 耕作制度对胡麻土壤酶活性的影响 |
| Effect of cropping system on flax soil enzyme activity |
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| DOI：10.7606/j.issn.1000-7601.2019.03.23 |
| 中文关键词: 耕作制度 胡麻 土壤酶活性 土壤养分 通径分析 |
| 英文关键词:cropping system flax soil enzyme activity soil nutrient path analysis |
| 基金项目:国家特色油料产业技术体系项目(CARS-14-2-23)；国家自然科学基金地区基金项目（31660391，31460350）；甘肃省农业科学院中青年基金（2016GAAS53）;甘肃省农业科学院农业科技创新专项(2017GAAS35) |
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| 中文摘要: |
| 采用“轮作、休闲、连作、间作、休闲1年-种植”5种耕作模式，结合通径分析，研究不同耕作制度对胡麻土壤酶活性变化特征的影响，以及土壤养分对土壤酶的影响效应。结果表明：（1）胡麻枞形期，研究区表土层4种土壤酶活性各处理间无显著差异（P＜0.05）,说明不同耕作制度在胡麻生长前期对土壤酶影响不明显；盛花期，蔗糖酶活性T1、T2、T3和T4分别较T5提高44.6%、53.3%、61.9%和34.9%，脲酶活性T5、T1和T2分别较T4提高266.0%、157.0%和140.0%，碱性磷酸酶活性T3较T2提高54.0%；硕果期，过氧化氢酶活性T2 和T3分别为1.41 mL·g-1·h-1和1.51 mL·g-4·h-1，显著高于T1、T4和T5；（2）胡麻盛花期，亚土层土壤脲酶活性T2和T5分别为1.74 mg·g-1·d-1和1.70 mg·g-1·d-1，显著高于T1、T3和T4；过氧化氢酶活性T1较T5提高212.0%，碱性磷酸酶活性T5较T4提高了21.6%；（3）蔗糖酶与碱性磷酸酶间显著负相关，与脲酶间正相关，其余酶为负相关；（4）耕层不同土壤酶活性受土壤养分因子影响的多重效应不同，pH、全磷含量能够促进蔗糖酶、过氧化氢酶活性提高，有机质、pH含量促进碱性磷酸酶活性提高；亚土层不同土壤酶活性受土壤因子影响的多重效应增加，主要为限制因子，且限制因子数要远大于表土层。 |
| 英文摘要: |
| With five different cropping systems: rotation, fallow, continuous cropping, intercropping, and fallow-cropping rotation, combined with path analysis,we studied the effect of soil nutrients on enzymes activities under different cropping systems in flax field. The results showed that: (1) In flax shapping period, there were no significant differences in soil enzyme activities in the topsoil of the study area (P<0.05), indicating that different cropping systems had no obvious effect on soil enzyme activities in the early stage of flax growth; At the flowering stage,invertase activity under T1, T2, T3 and T4 increased by 44.6%, 53.3%, 61.9% and 34.9%, respectively, compared with that under T5; urease activity under T5, T1, and T2 increased by 266.0%, 157.0% and 140.0%, respectively, compared with that under T4; alkaline phosphatase activity under T3 increased by 54.0% compared with that of T2; At the fruit stage, the catalase activities under T2 and T3 were 1.41 mL·g-1·h-1 and 1.51 mL·g-1·h-1, which were significantly higher than that of T1, T4, and T5. (2) In flax flowering period, urease activity of T2 and T5 were 1.74 mg·g-1·d-1 and 1.70 mg·g-1·d-1, respectively, which were significantly higher than that of T1, T3 and T4 in subsoil; catalase activity under T1 increased by 212.0% compared to T5; alkaline phosphatase activity of T5 increased by 21.6% compared with T4. (3) Invertase had a significant positive correlation with urease but negative correlation with alkaline phosphatase and the other enzymes. (4) In topsoil, different soil enzyme activities were affected by multiple effects of soil nutrient factors: pH and total phosphorus content promoted the activities of invertase and catalase while the organic matter and pH content promoted alkaline phosphatase activity; In subsoil, soil enzyme activities were affected by the multiple effects of soil factors, mainly limiting factors and the number of limiting factors was much greater than that in the topsoil. |
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