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- Title
耕作深度对植烟土壤理化特征及氨氧化微生物的影响.
- Authors
杨如意; 陈 涛; 廖 睿; 况 帅; 徐艳丽; 宋文静; 张 波
- Abstract
[ Objective]The effect of tillage depth on the physical and chemical properties, soil-related enzyme activities and ammonia oxidizing functional flora of tobacco-growing soil were studied to explore the effects of tillage measures and soil environmental factors on ammonia oxidation microbial change characteristics. [Method] Different tillage depths of 10 cm ( CK), 20 cm ( Sl ) and 30 cm ( S2) were set in Baoshan, Yunnan province, using a randomized block experimental design to explore the effects of different tillage depths on physicochemical properties, soil enzyme activities and ammonia oxidizing microorganisms of tobacco-planting soil in different soil layers. [Result] In the 0 - 20 cm soil layer, compared with CK, the soil bulk density of Sl and S2 treatment decreased significantly, the decrease rate was 5. 87%, 5. 10%, respectively; In the 0 - 20 and 20 - 40 cm soil layer, compared with CK, the contents of soil organic matter, nitrate nitrogen, and available potassium in the S2 treatment increased significantly, and the increase rates were 10. 68% and 11. 45%, 103. 26% and 159. 74%, 90. 59% and 103. 52%, respectively; In the 0 - 20 cm soil layer, compared with CK, soil nitrate nitrogen in the Sl, S2 treatments increased significantly, and the increase rate was 106. 42%, 103. 26%, respectively; In the 20 -40 cm soil layer, compared with CK, soil nitrate nitrogen in the S2 treatment increased significantly, and the increase rate was 28. 19% ; Compared with CK, the soil microbial carbon and urease activity in the S2 treatment were significantly reduced by 27. 77% and 36. 84%, respectively; The composition of the bacterial flora was the same under different tillage depths, and the proportions of each flora were slightly different Proteobacteria abundance in the AOB flora under the S2 treatment increased; Different tillage depth treatments changed the community abundance of ammonia oxidizing microorganisms AOA and AOB, among which NH4+ was the environmental factor that had the greatest impact on the AOA community structure, and organic matter was the environmental factor that had the greatest impact on the AOB community structure. [Conclusion] Deep planting is beneficial for improving soil physical structure, increasing soil nutrient content, and changing the AOA and AOB community structures.
- Subjects
SOIL ripping; SOIL enzymology; SOILS; AMMONIA; MICROORGANISMS
- Publication
Southwest China Journal of Agricultural Sciences, 2023, Vol 36, Issue 10, p2210
- ISSN
1001-4829
- Publication type
Article
- DOI
10.16213/j.cnki.scjas.2023.10.017