绿肥翻压对烟地红壤微生物及土壤养分的影响

摘要

To explore the biological mechanisms of the green manure to improve fertility of tobacco cultivation red soil, the effects of purple green manure plowing and wheat stubble plowing on microorganisms, soil enzyme activity and nutrient content of tobacco cultivation red soil were studied with the control of fallow land. The results showed that: bacteria, actinomy-cetes, soil enzyme activity, soil organic matter and nutrient content of green manure treated soil were higher than those of wheat stubble treated land and those of fallow land, changes in differences were significant (p <0.05) or highly significant (p <0. 01) , and fungi of wheat stuble were higher than those. Green manure plowing land , wheat stubble plowing land and fallow land to compare; soil bacteria in Yuezhou test area were increased 1.74 × 10 6 , 2. 61 × 10 6 cfu · g-1, actinomy-cetes increased 1. 35 × 10 4, 0.65 × 10 4 cfu · g-1. Soil urease increased 1.50, 1.68 mg · g-1, acid phosphatase increased 2. 90, 3. 09 mg · g-1, catalase increased 1.20, 2. 54 Ml · g-1, polyphenol oxidase enzyme increased 1.91, 7. 58 mg ? Kg-1, soil organic matter increased 16. 36, 26. 22 g · kg-1, soil available N increased 42. 52, 54.31 mg- kg-1, soil a-vaikble P increased 6.22, 7. 57 mg · kg-1, soil bacteria in Jinning test area increased 2. 52 × 10 6, 3.95 × l0 6 cfu ? G-1 , actinomycetes increased 1.17 × 10 4, 1. 62 × 10 4 cfu · g-1, soil urease increased 1. 77 , 2. 00 mg · g-1, acid phosphatase increased 1. 13, 1. 24 mg · g-1, catalase increased 1.45, 2.19 Ml · g-1, polyphenol oxidase increased 4. 81, 11. 34 mg · kg-1, soil organic matter increased 10.18, 19.43 g · kg-1, soil available N increased 41. 34, 54. 43 mg · kg-1, soil available P increased 4.79, 5. 86 mg · kg-1.%为探讨绿肥对烟地红壤改良培肥的生物机制,试验以冬闲地为对照,研究了紫花苕绿肥翻压及麦茬翻压对烟地红壤微生物、土壤酶活性及养分含量的影响.结果表明,绿肥翻压处理的土壤细菌、放线菌、土壤酶活性、土壤有机质及养分含量均高于麦茬翻压地和冬闲地,变化差异达到显著(P＜0.05)或极显著水平(P＜0.01),而真菌数均以麦茬地较高.绿肥翻压地分别与麦茬翻压地和冬闲地比较:在越州试验区的土壤细菌分别提高1.74×106、2.61×106cfu·g-1,放线菌提高1.35×104、0.65×104cfu·g-1,土壤脲酶提高1.5、1.68 mg·g-1,酸性磷酸酶提高2.9、3.09 mg·g-1,过氧化氢酶提高1.2、2.54 mL·g-1,多酚氧化酶提高1.91、7.58 mg·kg-1,土壤有机质提高16.36、26.22 g· kg-1,土壤碱解N提高42.52、54.31mg· kg-1,土壤速效磷(P205)提高6.22、7.57 mg·kg-1;在晋宁试验区的土壤细菌分别提高2.52×106、3.95×106cfu·g-1,放线菌提高1.17×104、1.62×104cfu·g-1,土壤脲酶提高1.77、2.0 mg· g-1,酸性磷酸酶提高1.13、1.24 mg·g-1,过氧化氢酶提高1.45、2.19 mL·g-1,多酚氧化酶提高4.81、11.34mg· kg-1,土壤有机质提高10.18、19.43 g·kg-1,土壤碱解N提高41.34、54.43mg·kg-1,土壤速效磷( P205)提高4.79、5.86 mg·kg-.