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以“凯特二号”番茄为试材,研究了大蒜秸秆不同施用量对温室番茄连作土壤温度、容重、孔隙度、pH值和电导率等理化性质及其根系活力的影响。结果表明:施用大蒜秸秆后,温室番茄连作土壤0~15cm内的最高和最低温度均与秸秆量成正比,最高和最低温度分别比对照高2.39℃和1.00℃;不同土层容重均随秸秆施用量增加而降低,孔隙度则随之而增加,0~10cm土层的变化幅度最大,容重最大增幅和孔隙度的最大降幅分别为6.71%和6.18%;大蒜秸秆处理还可提高土壤pH值、降低土壤的电导度(EC),可减轻温室土壤酸化和遏制土壤次生盐渍化,0~20cm土层内的效果较明显;施用大蒜秸秆提高了番茄生长前期的根系活力(最高为31.45%),延缓了后期根系衰老。因此,大蒜秸秆还田可改善温室番茄连作土壤理化性质和提高番茄根系活力。
Effects of different application rates of garlic straw on the physicochemical properties and root activity of soil in tomato greenhouse under continuous cropping were studied using “Cate # 2” tomato as test material. The results showed that after applying garlic straw, the highest and the lowest temperature of 0 ~ 15cm in tomato continuous cropping greenhouse were proportional to the amount of straw, the highest and the lowest temperature were 2.39 ℃ and 1.00 ℃ higher than the control respectively; The amount of soil increased with the increase of porosity and the porosity increased with the increase of 0-10 cm soil layer. The maximum increase of bulk density and the maximum decrease of porosity were 6.71% and 6.18%, respectively. Garlic straw treatment could also increase soil pH value, Reducing the soil electrical conductivity (EC) can reduce soil acidification and soil salinization in the greenhouse, and the effect is obvious in 0-20 cm soil layer. The application of garlic straw increased the root activity of tomato at the early growth stage (up to 31.45% ), Postponed the root aging. Therefore, garlic straw returning to field can improve the physical and chemical properties of tomato in continuous cropping and improve tomato root activity.