蚯蚓粪对盐碱土壤速效养分和碱化指标的影响

Effect of Wormcast on Saline Soil Available Nutrient and Alkalizing Index

本试验采用盆栽的方式进行,按照蚯蚓粪和盐碱土的不同配比设置处理,在大豆的不同生育时期取样,探讨了施用污泥蚯蚓粪对盐碱土壤速效养分含量和碱化指标的影响。结果表明:施加蚯蚓粪的各处理与对照相比,均增加了土壤速效氮、磷、钾养分的含量,且随着蚯蚓粪含量的增加而增加;降低了土壤的pH值,增加了土壤阳离子交换量,降低了土壤碱化度、总碱度和钠吸附比,各处理与对照相比pH值分别降低了0.56、0.6、0.66、0.7和0.79个单位;阳离子交换量分别提高了25.70%、28.52%、36.84%、64.63%和77.60%;碱化度分别降低了74.27%、78.70%、81.35%、84.95%和86.91%;总碱度分别降低了20.39%、23.68%、27.89%、30.52%和31.84%;钠吸附比分别降低了64.01%、68.32%、69.11%、67.80%和65.05%。以上说明,蚯蚓粪对盐碱土壤具有一定的改良效果。

The test uses manner of pot, discusses the affect worm- cast application of sewage sludge on saline soil available nutrient content and salinity indicators in accordance with wormeast and saline soils different ratio setting process at different growth stages of soybean samples. The results showed that： compared with CK, each treatment applied to wormcast were increased soil available nitrogen, available phosphorus and available potassium content. With the wormcast content increases, available nutrient were increase; decreased soil pH, increased soil cation exchange capac- ity, decreased soil alkalization, total alkalinity and sodium adsorp- tion ratio, compared with CK, the pH of each treatment were reduced 0.56, 0.6, 0.66, 0.7 and 0.79 units; cation exchange capacity were increased by 25.70%, 28.52%, 36.84%, 64.63% and 77.60%; basicity decreased by 74.27%, 78.70%, 81.35%, 84.95% and 86.91%; total alkalinity decreased by 20.39%, 23.68%, 27.89%, 30.52% and 31.84%; sodium adsorption ratio decreased by 64.01%, 68.32%, 69.11%, 67.80% and 65.05%. The above statements describe the wormcast has a certain contribution to improve saline soil