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以草莓重茬10年的温室大棚土壤为例,研究缓苗期、现蕾期、幼果期和盛果期草莓根际土壤的碱性磷酸酶、脲酶和蔗糖酶的活性动态特征,探究其与重茬的关系。结果表明:重茬草莓根际土壤的碱性磷酸酶在缓苗期和现蕾期的活性(2.21、3.26mg/g)都显著低于同期的非重茬土壤的酶活性(3.08、4.97mg/g),二者在幼果期和盛果期无显著差异,都在0.33mg/g以下;重茬草莓根际土壤脲酶的活性在缓苗期与非重茬土壤的酶活性无显著差异,在现蕾期的酶活性(0.40mg/g)显著高于非重茬土壤的峰值(0.29mg/g),在幼果期和盛果期的酶活性(0.20、0.18mg/g)显著低于非重茬根际土壤的酶活性(0.35、0.34mg/g);重茬根际土壤的蔗糖酶活性值(2.23~2.88mg/g)在4个生长期无显著差异,除盛果期外都显著低于非重茬根际土壤的(5.54、6.91、7.56mg/g)1倍以上。结果表明,重茬土壤可以显著抑制土壤酶活性。
Taking 10-year-old straw greenhouse soil as an example, the dynamic characteristics of alkaline phosphatase, urease and invertase activity in the rhizosphere soil of strawberry rhizosphere were studied at the seedling stage, bud stage, young fruit stage and full fruit stage, Stubble of the relationship. The results showed that the activities of alkaline phosphatase in rhizosphere soil during recuperation were significantly lower (2.21 and 3.36 mg / g) than those in non-re-stubble soil during the same period (3.08, 4.97 mg / g ). There was no significant difference between them in the young fruit stage and the full fruit stage, all below 0.33mg / g. There was no significant difference in soil urease activity in the rhizosphere soil between recuperation and straw mulching stage (0.40 mg / g) was significantly higher than that of non-stubble soil (0.29 mg / g), and the enzyme activities (0.20,0.18 mg / g) in young and full fruit stages were significantly lower than those of non-stubble roots (0.35,0.34 mg / g). The activity of invertase in rhizosphere soil of re-cropping soil (2.23-2.88 mg / g) showed no significant difference in four growth stages Re-cropping rhizosphere soil (5.54,6.91,7.56mg / g) more than 1 times. The results showed that soil reclamation could significantly inhibit soil enzyme activity.