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采用大田试验,研究“123种植模式”(B,RVCs)和休闲轮作模式(A,FRCs)、蔬菜连作模式(C,VCCs)对土壤脲酶、过氧化氢酶、酸性磷酸酶、蔗糖酶和多酚氧化酶活性及土壤养分的影响,以及土壤酶学因子与土壤养分的关系。结果表明:整套模式完成后,土壤蔗糖酶、脲酶和酸性磷酸酶的3种种植模式酶活性均表现为0～15cm高于15～30cm土层;过氧化氢酶活性则反之;多酚氧化酶活性表现为A模式0～15cm高于15～30cm土层,B、C模式土层之间15～30cm高于0～15cm。与传统模式和当地模式相比,“123种植模式”显著提高了土壤酸性磷酸酶、蔗糖酶的活性,降低了过氧化氢酶活性和多酚氧化酶活性;脲酶活性为C>B>A。经相关分析、通径分析发现土壤脲酶、酸性磷酸酶和多酚氧化酶与土壤养分的相关性呈显著或极显著水平。土壤速效磷对脲酶、酸性磷酸酶、多酚氧化酶的影响力直接作用和间接作用均为最大,其它养分因子对以上三种酶的影响主要体现在直接影响上。
Field experiments were carried out to study the effects of C, VCCs on soil urease, catalase, acid phosphatase, invertase, and catalase activities under “123 planting patterns” (B, RVCs) and fallow rotation patterns (A, FRCs) and vegetable continuous cropping patterns And polyphenol oxidase activity and soil nutrients, as well as the relationship between soil enzymatic factors and soil nutrients. The results showed that after the whole model was completed, the activities of soil invertase, urease and acid phosphatase in three planting modes showed 0 ~ 15cm higher than 15 ~ 30cm soil layer; the activity of catalase was opposite; the activity of polyphenol oxidase The activity is 0 ~ 15cm higher than 15 ~ 30cm soil layer in A mode and 15 ~ 30cm higher than 0 ~ 15cm soil layer in soil layers of B and C soil model. Compared with the traditional model and the local model, “123 planting mode” significantly increased the activity of soil acid phosphatase and invertase, reduced the activity of catalase and polyphenol oxidase; the activity of urease was C> B> A. Correlation analysis and path analysis showed that there was significant or extremely significant correlation between soil urease, acid phosphatase and polyphenol oxidase. Soil available phosphorus on urease, acid phosphatase, polyphenol oxidase direct and indirect effects are the largest, the impact of other nutrients on the above three enzymes are mainly reflected in the direct impact on.