【摘要】 根据高产小麦氮、磷、钾养分日吸收力和强度比判断 :氮的临界期在分蘖期 ,磷和钾在小麦返青前 ,氮最大效率期在孕穗 -成熟 ,磷和钾在拔节后更多还原

【Abstract】 According to the evaluation of daily absorption of nitrogen, phosphorus and potassium quantity and uptaking intensity ratios winter wheat with high yield , nitrogen nutrient critical stage came in wheat tillering stage, and the same stage of phosphorus and potassium appeared ahead of wheat reviving stage; the highest efficiency of nitrogen absorption was in booting ripening stage, that of phosphorus and potassium was after wheat jointing stage.更多还原