Effects Of Organic-inorganic Fertilizer On Microbial, Enzyme And Nutrients Of Continuous Cropping Maize

This paper using field regional test research the effects of different organic-inorganic fertilizer on continuous cropping maize in the soil microbial biomass quantity, soil enzymes,nutrients and yield, the effect of organic fertilizer with on continuous cropping of maize soil improvement effect. Test results are as follows:(1) Continuous cropping of maize during maize growth stage the treatment with processing soil biomass carbon and nitrogen content were higher than in any other single fertilization process, and the change tendency is to reduce are first rise again, reached the maximum in tasseling stage. In tasseling stage, soil microbial biomass carbon content is T2 > T3 > T1 > T4 > T5, 5% level of significant differences between treatment, soil microbial nitrogen is T2 > T3 > T4 > T1 > T5, also reached 5% significant differences between treatment levels; In the jointing stage and mature stage soil microbial biomass carbon were significantly related to the maize yield, soil microbial biomass nitrogen in the mature stage were significantly related to the maize yield.(2) Continuous cropping of maize during maize growth stage the treatment with processing soil urease, invertase and catalase activity are higher than any other single fertilizer and no fertilizer treatment, all reached the maximum in tasseling stage, changing trend is increased first, then decreased. In jointing stage and tasseling stage soil urease activity is T2 > T3 > T1 > T4 > T5, 5% significant difference levels between the treatment with processing; Soil invertase activity in tasseling stage T2 > T4 > T3 > T1 > T5, T2, T4 with other treatments at 5% level of significant difference; Soil catalase activity in tasseling stage T2 > T3 > T1 > T4 > T5, and almost reached 5% significant difference levels; In tasseling soil urease activity and catalase were significantly related to the maize yield, and sucrase reached extremely significant correlation.(3) Continuous cropping of maize during maize growth stage soil bacteria of the treatments increased first then decreased. The change in tasseling stage reached maximum number of bacteria, T2 > T3 > T4 > T1 > T5, T2、 T3、 T4 and T1、T5 at 5% level of significant difference level; Soil actinomyces number change first increased and peaked tasseling stage, T1 > T3 > T3 > T4 > T5, T1 and other treatments reached 5% of the significant differences level; In addition to the T5,soil fungi number was increased firstly, then decreased, reached maximum at tasseling stage, T1 > T4 > T3 > T2 > T5, TI and other processing reached 5% significant differences level; The number of soil bacteria in jointing stage and mature stage were significantly related to the maize yield, tasseling stage reached extremely significant correlation.(4) Soil available nitrogen content in maize growth period in addition to T4 was increased firstly, then decreased, in tasseling stage T2 > T1 > T3 > T4 > T5, differences level is not significant; Soil available phosphorus in addition to T4 was increased firstly, then decreased.in tasseling stage T2 > T3 > T1 > T5 > T4, T2 and the other treatments at 5% level of significant differences; The change regular of soil available potassium is not obvious; Soil total nitrogen content of the treatments jointing stage > mature stage, the change regular of soil total phosphorus is not obvious; Soil p H variation of T1, T2 and T3 is relatively lower.(5) Maize yield T2 > T3 > T1 > T4 > T5, the treatment with processing is obviously in increasing production, and at 5% significant differences level between other treatments.