【摘要】 在合适的土壤供磷强度下（10～20 mg/kg），以玉米为供试植物，选用9种不同类型的有机水溶肥以及5个碳用量梯度（0、RC （厂家推荐用量）、60、240、600 mg），分析相同类型有机水溶肥在不同碳用量梯度条件下及不同类型有机水溶肥在相同碳用量条件下玉米生长状况、土壤有效磷含量的变化情况。结果表明：不同碳用量处理对玉米生长均存在促生效应，提高了土壤有效磷含量，改善了玉米氮磷钾营养状况，促进了植物生长。不同类型有机水溶肥在相同碳用量条件下尽管施入土壤的氮磷元素量不同，但对玉米促生作用不存在显著差异，表明有机水溶肥发挥肥效的主要成分并非氮磷元素，而是水溶性有机碳；不同类型有机水溶肥在相同碳用量条件下对土壤磷有效性的影响存在显著差异，表明水溶性有机碳类型影响土壤磷素转化过程。相同类型有机水溶肥在不同碳用量条件下对玉米促生作用存在显著差异，随土壤碳用量升高表现为先增强后不变的趋势，有机碳施用量为土壤有效磷含量的2倍时效果最佳。更多还原

【Abstract】 Under suitable soil phosphorus supply intensity(10-20 mg/kg), 9 different types of organic water-soluble fertilizers and 5 carbon dosage gradients(0,RC(manufacturer’s recommended dosage),60,240,600 mg)are selected,the changes of maize growth status and soil available phosphorus content with the same organic water-soluble fertilizer under different carbon dosage gradient conditions and different types of organic water-soluble fertilizer under same carbon dosage gradient conditions are analyzed. The results show that different carbon dosages has a growth-promoting effect on maize growth,increasing soil available phosphorus content,improving maize nitrogen,phosphorus and potassium nutrient status,and promoting plant growth. There is no significant difference in the growth promotion effect of different types of organic water-soluble fertilizers on maize under the same carbon dosage conditions,although the nitrogen and phosphorus content applied to the soil is different,indicating that the main components of organic water-soluble fertilizer are not nitrogen and phosphorus,but water-soluble organic carbon. There are significant differences in the effects of different types of organic water-soluble fertilizers on soil phosphorus availability under the same carbon dosage,indicating that the types of water-soluble organic carbon affects the soil phosphorus conversion process. With the increase of soil carbon dosage,the growth promotion effect on maize shows a trend of first increasing and then unchanged,and the best effect is achieved when the organic carbon application rate is 2 times of the soil available phosphorus content.更多还原