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通过田间小区试验的方法 ,研究了不同含盐量的滨海盐土上不同用量过磷酸钙对耐盐植物油葵 (G10 1B)生长的影响。结果表明 :(1)在中强度和轻度盐渍化土壤上施用过磷酸钙 ,油葵的增产幅度前者明显高于后者 ,而过磷酸钙的最佳用量前者却明显低于后者 ;(2 )过磷酸钙用量明显影响油葵植株Ca2 +、Na+离子的积累量 ,在供试范围内 ,随着过磷酸钙用量的增加 ,油葵根、茎、叶中的Na+积累量明显减少 ,茎叶中Na+降幅比根部更大 ;(3)随着过磷酸钙用量增加 ,油葵体内SRK ,Na也随之加大 ,表明油葵对K+的选择性运输加强 ,对缓解滨海盐土的盐害有明显作用。
The effects of different dosages of superphosphate on the salt tolerant oil sunflower (G10 1B) in coastal saline soils with different salinities were studied through field plot experiments. The results showed that: (1) The former was higher than the latter when the superphosphate and sunflower were applied on medium and light salinized soils, but the former was obviously lower than the latter. (2) The amount of calcium superphosphate significantly affected the accumulation of Ca2 + and Na + in oil sunflower plants. Within the range of test, the accumulation of Na + in roots, stems and leaves of oil sunflower significantly decreased with the increase of the dosage of superphosphate (3) With the increase of the amount of superphosphate, the SRK and Na in oil sunflower also increased, which indicated that the selective transportation of oil sunflower to K + was stronger than that of roots, Salt damage has a significant effect.