钙素及秸秆物料对40茬番茄连作土壤的修复效应初报

Effects on Growth and Rhizosphere Environment of the Continuous Cropping Tomato with Calcium and Straw Materials

为修复连作番茄土壤,以番茄辽园多丽为试材,通过水泥池微区区组栽培试验,探讨了钙素及秸秆物料对番茄连作生长前期植株干物质积累、根际土壤微生物数量、土壤速效养分含量和土壤酶活性的影响。结果表明:与对照相比,施入生石灰可降低番茄连作土壤细菌和放线菌的数量,提高pH值,显著提高土壤蔗糖酶活性和细菌与真菌的比值(B/F),其中Ca处理的微生物数量总量最低,为43.3×105CFU·g-1,而CCa处理的pH最高,为6.5;稻草秸秆可显著提高放线菌、细菌的数量,脲酶活性,B/F,速效磷含量,其中R处理的土壤速效磷含量最高,为276.9mg·kg-1;对于提高植株干物质积累,秸秆、生石灰和碳化玉米芯均有显著作用。

For tomato continuous cropping soil remediation, tomato -Liao yuan duo li as cultivation experiment was carried out in cement plot experiment. The effects of the continuous cropping tomato were investigated in the plant dry matter accumulation, rhizosphere soil microbial quantity, soil available nutrient content, soil enzyme activity in the early stage with calcium and straw materials. The results obtained are listed as follows. The quantity of soil bacteria and actinomyces were decreased. The total microbial number of the R treatment is lowest as 43.3×10^5CFU·g^-1. The ratios of B/F and sucrase activities were increased significantly. The pH was higher than those without quick lime. The pH of Ca treatment was highest as 6.5. The quantity of actinomycetes, bacteria, the ratios of B/F and available phosphorus content were increased. Urease activities were higher than those without straw. The available P content of R treatment was supreme as 276.gmg·kg^-1. Carbonized corncob straw stalk and quick lime has a significant role of plant dry matter accumulation of tomato.