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为了阐明废弃物施加对稻田土壤团聚体分布及其稳定性的影响,以福州平原稻田为研究对象,对对照、石膏、贝壳、生物炭和炉渣5种处理样地0~10 cm、10~20 cm、20~30 cm土层土壤团聚体分布及其稳定性,包括>0.25 mm团聚体含量(DR0.25)、平均质量直径(MWD)、几何平均直径(GMD)、分形维数(D)进行了测定和分析.结果表明,与对照样地相比,石膏、贝壳、生物炭和炉渣施加后均增加了土壤团聚体DR0.25、MWD和GMD值,其中,石膏施加后土壤团聚体DR0.25、MWD和GMD值分别增加了12.76%、12.13%和12.17%,贝壳施加后分别增加了32.65%、31.83%和33.86%,生物炭施加后分别增加了12.07%、9.32%和11.70%,炉渣施加后分别增加了19.70%、13.59%和18.10%,但与对照样地相比,石膏、贝壳、生物炭和炉渣施加后土壤团聚体分形维数均表现为减小的趋势,分别减小了4.02%、11.65%、4.37%、9.29%.从土壤团聚体DR0.25、MWD、GMD值和分形维数的变化特征来看,石膏、贝壳、生物炭和炉渣施加均提高了土壤团聚体的稳定性.
In order to elucidate the effects of waste application on the distribution and stability of aggregates in paddy soils, the paddy fields in Fuzhou Plain were selected as study objects. Five treatments including 0, 10, 10, 20 cm and 20 ~ 30 cm soil layer, including the aggregate content> 0.25 mm, the average mass diameter (MWD), the geometric mean diameter (GMD) and the fractal dimension (D) The results showed that the values of DR0.25, MWD and GMD of soil aggregates increased after the application of gypsum, shell, biochar and slag compared with the control plots, in which the soil aggregates DR0 .25, MWD and GMD increased by 12.76%, 12.13% and 12.17%, respectively. After the application of shellfish, they increased by 32.65%, 31.83% and 33.86%, respectively, and increased by 12.07%, 9.32% and 11.70% Compared with the control plots, the fractal dimensions of soil aggregates showed a decreasing tendency compared with the control plots, and the fractal dimension of soil aggregates decreased after application of gypsum, shell, biochar and slag, respectively 4.02%, 11.65%, 4.37% and 9.29%, respectively.The soil aggregates DR0.25, MWD, GMD and fractal Variations of dimensionality, gypsum, shell, biochar and slag application all improve the stability of soil aggregates.