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以压砂西瓜→大豆(W→S)、西瓜→辣椒(W→P)、西瓜→油葵(W→O)3种轮作模式以及西瓜连作(对照,CK)的土壤为研究对象,研究了3种不同砂田轮作模式对酶活性与微生物区系的影响。结果表明:与对照相比,3种不同轮作模式土壤脲酶活性和碱性磷酸酶活性轮作均显著增强,土壤蔗糖酶活性和过氧化氢酶活性W→P模式显著高于对照,其它轮作模式与对照保持平衡;轮作模式下微生物总菌数增加,其中细菌、放线菌数量、细菌与真菌比值(B/F)均高于对照,真菌数量显著低于对照;通过微生物群落碳源利用分析表明,轮作提高了微生物群落对碳源的利用,增强了微生物群落生理活性。合理的轮作倒茬对延长砂田寿命、恢复和提高砂田地力有着积极的意义,W→P为较合理的轮作模式之一。
The soil samples from three types of watermelon rotation (W → S), watermelon → peppers (W → P), watermelon → sunflower (W → O) and watermelon continuous cropping (CK) Effect of Three Different Crop Rotation Patterns on Enzyme Activity and Microbial Flora. The results showed that compared with the control, the soil urease activity and alkaline phosphatase activity in three different crop rotation patterns were significantly enhanced, the soil invertase activity and catalase activity W → P mode was significantly higher than the control, the other crop rotation patterns and The number of bacteria, actinomycetes and the ratio of bacteria to fungi (B / F) were higher than those of the control, and the number of fungi was significantly lower than that of the control. Through the analysis of carbon source utilization in microbial communities , Rotation increased microbial community utilization of carbon sources and enhanced microbial community physiological activity. Reasonable crop rotation has positive meanings for prolonging the life of the sand field and restoring and improving the ground force of the sand land. W → P is one of the more reasonable rotation patterns.