The effects of the different proportions of manure and chemical fertilizer on rice growth, yield, soil microorganism quantity and soil enzyme activity was studied with N 180 kg·hm-2 , K2 O 120 kg·hm-2 , not less than P2 O5 90 kg·hm-2 . The results showed that for the combined application of manure and chemical fertilizer according to the proportion of nitrogen of 3:7 (T3), the theoretical and practical yield were the maximum and significantly higher than other treatments, compared with the chemical fertilizer treatment ( T1 ) , the theoretical and practical yield increased by 27. 71% and 14. 67% respectively. The amounts of microorganisms ( bacteria, fungi and actinomycetes ) were significantly higher than other treatments except bacteria and fungi in tillering stage. The soil catalase enzyme activity, urinary enzyme activity and invertase activity were maxi-mum in rice mature period, and significantly higher than other treatments. Therefore, with certain rate of fertilization, appro-priate combined application of manure and chemical fertilizer could significantly increase rice yield, improve soil microorganism quantity and soil enzyme activities, to increase soil fertility.%在施肥按照全N 180 kg·hm-2、 K2 O 120 kg·hm-2、 P2 O5不低于90 kg·hm-2的条件下, 研究了有机与无机肥的不同比例配施对水稻生长、 产量、 土壤微生物数量和酶活性的影响. 结果表明, 当季有机无机肥中的氮素比例为3:7 (T3) 时, 其理论产量和实际产量都最大, 并显著高于其他处理, 相比全施化肥的处理 (T1), 其理论产量提高了27. 71%, 实际产量提高了14. 67%; 其微生物 (细菌、 真菌和放线菌) 数量除了分蘖期的细菌和真菌外都显著高于其他处理; 其水稻成熟期的土壤过氧化氢酶活性、 脲酶活性和蔗糖酶活性最大, 并显著高于其他处理. 因此, 在一定的施肥条件下, 有机无机肥的合理配施, 可以显著增加水稻的产量, 增加土壤微生物数量, 提高土壤酶活性, 达到培肥的目的.
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