钼、硒互作对2茬小白菜钼、硒含量及土壤钼、硒有效性的影响

Effects of the interaction between Mo and Se fertilizers on the contents of Mo and Se in Chinese cabbage and contents of soil-available Mo and Se during two successive planting periods

通过盆栽试验研究钼、硒互作对2茬连作小白菜的产量和钼、硒含量以及土壤钼、硒有效性的影响。结果表明:钼、硒互作能提高第1茬小白菜的产量,对第2茬小白菜的产量影响不大;钼、硒互作能促进2茬小白菜对钼的吸收和累积,有效态钼在2茬小白菜种前土壤中均保持较高的含量,因此可以满足2茬小白菜富钼的需求;钼、硒互作同时促进2茬小白菜对硒的吸收,但是在第1茬小白菜采收后土壤中的水溶态硒和交换态硒的含量出现大幅降低,因此只能满足第1茬小白菜富硒的需求。

A pot experiment was conducted to determine the effects of application of molybdenum （Mo） and selenium （Se） on the yield, contents of Mo and Se in Chinese cabbage,and contents of soil-a- vailable Mo and Se during the two successive planting periods. The results showed that the yield was sig- nificantly increased by application of Mo and Se in the first harvest,while yield was not significantly in- creased by application of Mo and Se in the second harvest. Both application of Mo and Se could prompt the Mo uptaking of Chinese cabbage during the two successive planting periods. Soibavailable Mo main- tained high level during the two successive planting periods,and application of Mo could meet the needs of producing Mo-rieh cabbage during the two successive planting periods. Though both application of Mo and Se could prompt Se uptaking of Chinese cabbage during the two successive planting periods, water- soluble Se and exchangeable Se were decreased after the first harvest and application of Se only could meet the needs of producing Se-rieh cabbage in the first harvest.