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在温室条件下采用盆栽试验方法在4类典型土壤上种植小白菜,以自来水灌溉作为对照,研究再生水灌溉对小白菜生长、土壤磷形态转化特征以及不同类型土壤间的差异性。结果表明,全再生水灌溉:①显著增加红壤、潮土、塿土小白菜生物量,分别为9.1%,16.1%,9.9%;黑土小白菜生物量增加不显著;②显著增加4类土壤小白菜地上部磷含量和土壤速效磷含量,红壤、潮土、塿土和黑土的小白菜地上部磷含量分别增加17.6%,20.0%,18.8%和15.8%,土壤速效磷含量分别增加16.7%,32.2%,34.4%,16.8%;③显著增加红壤、潮土、塿土的活性有机磷和无机磷组分中活性较高的Ca2-P,黑土的Ca2-P含量显著增加,但其活性有机磷含量变化不大。再生水灌溉能促进土壤稳性较高的有机、无机磷组分向活性较高的组分转化,但不同类型土壤间存在差异性。
Potted cabbage was used to cultivate Chinese cabbage in four typical soils under greenhouse conditions. The tap water was used as a control to study the effects of reclaimed water irrigation on the growth of pakchoi, the transformation characteristics of soil phosphorus and the differences between different soil types. The results showed that the total reclaimed water irrigation: ① Significantly increased the biomass of red cabbage, alluvial soil and loamy soil cabbage, which were 9.1%, 16.1% and 9.9% respectively; the biomass of black cabbage did not increase significantly; The content of P in shoots and soil available phosphorus, red soil, alluvial soil, clayey soil and black soil increased by 17.6%, 20.0%, 18.8% and 15.8%, respectively, and the content of available phosphorus in soil increased by 16.7% and 32.2% %, 34.4% and 16.8%, respectively; ③ Significantly increase the activity of active organic phosphorus and inorganic phosphorus in red soil, alluvial soil and loamy soil. The content of Ca2-P in black soil increased significantly, but the content of active organic phosphorus Little change in content. Reclaimed water irrigation can promote the conversion of organic and inorganic phosphorus fractions with higher soil stability to more active fractions, but there are differences among different types of soils.