【摘要】 通过对红壤、沙壤和紫色土壤的高、低产桔园土壤进生物的研究,证实不同类型土壤和同类型不同肥力水平土壤的微生物种类和数量不同.酸性红壤的真菌、近中性沙壤的细菌、偏碱性土壤的放线菌数量最大.土壤中的微生物总量与土壤中的有机质和C/N等呈正相关.由于不同类型土壤高、低产园的微生物种类及数量不同,柑桔的生长势及产量等有明显的差异.同时提出了套种绿肥、增施有机肥等土壤改良措施.更多还原

【Abstract】 By investigation on the soil microorganism of high and low yield citrus fruit in red soil, sandy loam and purple soil. It was showed that kinds and amount of microorganism were different in the varied soil types, and with different soil fertility. The quantity of fungi was largest in the acid soil, the amount of bacteria was highest in the neutral sandy loam and the actinomyces was found to be dominant in the alkali basic purple soil. The total number of soil microorganism is positively correlated with the content of the organic matter, C:N etc. The growth vigor and fruit yield of orange were significently different due to the difference of the kinds and amount of the soil microorganism in high and low yield citrus groves of different soil types. Interplanting green munure crops, and application of organic fertilizers are effective to improve the soil.更多还原