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根据水稻生育期内长势,将育苗期内水稻分为长势良好、中等、死亡3类,将农田土壤分为盐害较轻、中等、较重3类,分别采集育苗期苗盘土壤及不同盐害程度农田土壤,分析盐碱地种植水稻的障碍性因子,得出以下结果:随着秧苗长势变差,苗盘土壤电导率显著增大;随着秧苗长势变差,苗盘土壤盐分含量显著增加,秧苗长势中等、死亡的苗盘土壤全盐含量分别是长势良好土壤的1.74倍和2.27倍;随着农田土壤盐害加重,土壤盐分含量显著增加,盐基离子Na~+、Mg~(2+)、SO_4~(2-)、Cl~-含量呈显著增加的趋势,盐基离子Na~+、Mg~(2+)、SO_4~(2-)、Cl~-含量是水稻能否正常生长发育的决定性因子。
According to the growth of rice during the growing season, the rice is divided into three categories: growing well, moderately, and dead. The soil of the farmland is divided into three types: light, medium and heavier. The soil and salt The results showed that: with the deterioration of seedling, the soil conductivity of seedling tray increased significantly; with the growth of seedlings worse, the salinity content of seedling tray increased significantly, The seedlings grew moderately, and the total salt content of the seedlings in the dead soil was 1.74 times and 2.27 times higher than that of the growing ones. With the aggravation of salt stress in the farmland, the content of soil salinity increased significantly. The contents of Na +, Mg 2+ ), SO_4 ~ (2 -) and Cl ~ - increased significantly. The content of Na ~ +, Mg ~ (2 +), SO_4 ~ (2 -) and Cl ~ The decisive factor in development.