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连续三年多点研究钾氮配施对大蒜生长及养分吸收利用的影响。结果表明:施用钾肥对大蒜的生长发育有明显的促进作用,三年试验平均,蒜苗、蒜苔和蒜头产量较不施钾的对照分别增长29.8~53.7%、30.4~39.7%和19.8~28.2%,平均增产42.9%、35.5%和24.1%。施用适量的氮钾肥提高了大蒜地上部茎叶含N量,大幅度增加茎叶、蒜苔、蒜头和全株P、K含量,改善大蒜植株的营养状况。两种氮肥水平下,大蒜地上部茎叶、蒜苔、蒜头和全株吸N、吸K及吸P量均随钾肥施用量的加大而提高。钾氮配施可促进磷素和钾素向蒜头的转移,从而提高P和K的再利用程度。
Study on the Effect of Potassium and Nitrogen Application on Garlic Growth and Nutrient Absorption and Utilization for More Three Years in a Row. The results showed that the application of potassium fertilizer had a significant effect on the growth and development of garlic. The yield of garlic, garlic and garlic increased 29.8-53.7%, 30.4-39.7% and 19.8-28.2% respectively over the three years, An average increase of 42.9%, 35.5% and 24.1%. Appropriate amounts of nitrogen and potassium fertilizers increased the content of N in shoots and leaves of garlic shoots, and significantly increased the content of P and K in stems, leaves, garlic shoots and whole plants, and improved the nutritional status of garlic plants. Under the two nitrogen levels, N, K uptake and P uptake of leaves, garlic shoots, garlic shoots and whole plant in shoots increased with the increase of K application rate. Potassium and nitrogen can promote the transfer of phosphorus and potassium to garlic, so as to increase the reusability of P and K.