不同改良剂对苏打盐碱地土壤质量及水稻产量的影响OA

To investigate the effects of different amendments on the quality of paddy soil and rice yield in soda saline alkali soil,and to screen convenient and efficient fertilization and improvement schemes for saline alkali soil.By conducting field experiments,a total of six treatments were set up:no amendment(T1),modified zeolite(T2),aluminum sulfate(T3),organic fertilizer(T4),modified zeolite+organic fertilizer(T5),and aluminum sulfate+organic fertilizer(T6).The differences in soil sa-linity and alkalinity indicators in the 0-60 cm soil layer and the differences in soil quality and rice yield in the 0-20 cm tillage layer were compared and analyzed among the treatments.The results showed that all treatments could improve soil quality and rice yield.Among them,the T6 treatment with aluminum sulfate and organic fertilizer had the highest soil quality index and rice yield,and had the best effect on improving soda saline alkali soil.It can be used as a convenient and efficient soil amendment scheme for improving soda saline alkali paddy fields.Compared with the control group T1,all treatments can reduce the pH value,total salt content,and sodium adsorption ratio of soil from 0 to 60 cm,change the composition of water-soluble cations in soil,increase the organic matter,available nutrient content,enzyme activity content of topsoil from 0 to 20 cm,and improve rice yield.The soil quality indices(SQI)of T1-T6 processing based on the entire dataset were 0.23,0.42,0.55,0.76,0.82,and 0.93,respectively.Among them,T6 processing had the highest SQI,and linear re-gression analysis showed a highly significant positive correlation between SQI and rice yield.