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利用田间试验研究了江苏省不同盐分滨海盐土上氮磷肥对油葵(G101-B)的综合效应,结果表明,(1)盐分、N肥、P肥对油葵的产量具有显著效应,以N肥影响最大;(2)每公顷105kg氮与81kg磷的肥料组合是两种盐分盐土上的油葵获得高产的最佳氮磷用量;(3)土壤不同盐分含量明显影响N、P肥对油葵的增产效应,高盐分下N、P肥对油葵的增产作用大于低盐分;(4)过磷酸钙能增强油葵对K+的选择性运输,提高油葵植株体内离子向上运输的K+、Na+选择性比率SRK,Na,对缓解滨海盐土的盐害有明显作用。
The field experiment was conducted to study the combined effect of nitrogen and phosphorus fertilizers on oil sunflower (G101-B) in coastal saline soil with different salt concentrations in Jiangsu Province. The results showed that (1) salinity, N fertilizer and P fertilizer had significant effects on oil sunflower yield, (2) The fertilizer combination of 105kg nitrogen and 81kg phosphorus per hectare is the best nitrogen and phosphorus dosage for the oil sunflower on salt-saline soil to obtain high yield. (3) The soil salt content obviously affects the effect of N, P fertilizer on oil (4) Superphosphate can enhance the selective transportation of oil sunflower to K + and increase the uptake of K + in oil sunflower plant, and increase the production of K + Na + selectivity SRK, Na, to alleviate the salinity of coastal saline have a significant role.