配施有机肥对潜育化水稻土的培肥效果

为探索潜育化水稻土的培肥措施,通过田间试验研究了有机无机肥配施对潜育化低产水稻土产量和土壤养分有效性的影响。结果显示:连续2季施用有机肥后,潜育化水稻土产量显著提高,以早稻配施紫云英-晚稻配施猪粪处理的产量最高。添加有机肥降低了潜育化水稻土耕层土壤p H值。早稻配施紫云英,晚稻配施猪粪处理的有机质提高明显,比NPK处理提高了15.22%;早稻配施紫云英,晚稻配施猪粪处理的潜育化水稻土全氮含量比单施化肥处理提高4.19%;早稻配施紫云英,晚稻单施化肥处理的潜育化水稻土有效磷含量提高最多,比NPK处理提高了4.92%;相比于NPK处理,早稻配施紫云英,晚稻单施化肥处理的土壤速效钾含量比两季均单施化肥处理提高了13.2%。因此,潜育化水稻土适当配施有机肥可以提高土壤养分有效性,增加水稻产量,可以作为培肥改良潜育化水稻土的参考方法。

Effect combined application of organic fertilizer on fertility of gleying paddy soil

The gleyed paddy soil is a main kind of low-yield paddy soil, which affects the improvement of rice yield greatly. A field experiment was carried out to discover the improvement effect of the combined application of organic and inorganic fer-tilizers on the soil total amounts of reducing substances and rice growth traits under ditch drainage condition. Results showed that, after two consecutive quarter of organic fertilizer application, yield in gley paddy soil increased significantly, and it was the highest of early rice with milk vetch-with pig manure of late rice treatment. Adding organic fertilizer decreased soil pH value of arable layer of gley paddy soil. Organic matter of early rice with milk vetch, late rice with pig manure increased obviously than that of NPK treatment by 15. 22%. The gley paddy soil total nitrogen content of early rice with milk vetch, late rice with pig manure was 4. 19%, which was higher than that of single fertilizer. The gley paddy soil phosphorus of ear-ly rice with milk vetch, late rice single fertilizer was the highest, which was increased by 4. 92% than that of NPK. Com-pared with the NPK treatment, soil available potassium content of early rice with milk vetch, late rice fertilization of chemi-cal fertilizer was 13. 2% higher than that of both season applying chemical fertilizer. Therefore, gley paddy soil with organic fertilizer improved the soil nutrient availability, appropriately increased rice yield, could be used as a method to improve gley paddy soil fertility.