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为探索潜育化水稻土改良培肥措施,采用田间试验研究了工程排水条件下有机无机肥配施对潜育化低产水稻土的改良效应。结果显示:有机无机肥配施增加了早、晚稻的有效分蘖数。在早稻齐穗期,与CK和NPK处理相比,有机无机肥配施的叶绿素(SPAD值)均显著增加。有机无机肥配施显著增加了晚稻的产量,与NPK处理相比,产量增加了10.0%~23.7%;其中早稻配施紫云英、晚稻配施猪粪处理产量最高。在工程排水基础上,配施有机肥处理在早、晚稻收获时耕层土壤还原物质总量分别比单施化肥处理减少了15.0%~25.3%和32.5%~37.5%。这表明,在工程排水条件下,配施一定的有机肥可以明显提高潜育化稻田水稻产量,降低表层土壤还原物质总量,对改良潜育化水稻土有明显作用。
In order to explore the measures to improve fertility of glebe in paddy soil, a field experiment was conducted to study the improving effect of organic-inorganic fertilizers on glebe-forming low-yield paddy soils under drainage conditions. The results showed that the combination of organic and inorganic fertilizer increased the effective tillers of early and late rice. Compared with CK and NPK treatment, the chlorophyll (SPAD value) of organic-inorganic fertilizers significantly increased at full heading stage of early rice. Compared with the NPK treatment, the yield increased by 10.0% ~ 23.7% compared with the NPK treatment. The combination of astragalus sinicus and the late rice with pig manure produced the highest yield. Based on the engineering drainage, the total amount of soil reducing substances in the topsoil decreased by 15.0% -25.3% and 32.5% -37.5%, respectively, compared with the single application of chemical fertilizers. This shows that under the conditions of engineering drainage, with a certain amount of organic fertilizer can significantly increase the yield of paddy rice in the gleyed and reduce the total amount of surface soil reducing substances, the improvement of gleaming paddy soil has a significant role.