摘要
供钾充足可促进冬小麦植株对氮、磷、钾三要素的吸收和氨基酸的合成与积累;提高物质生产能力,增加各器官的干物质积累量,促进开花后营养器官贮存的光合产物向生殖器官的再分配;促进植株开花后对氮素的吸收,改善^(15)N同化物的运转分配状况,使其以较高的比例转运至籽粒,提高籽粒蛋白质和氨基酸的含量,增加产量,改善品质。
The effect of potassium nutrition on absorption and distribution of nutrient, yield formation and grain quality in winter wheat with pot sand culture have been studied in 1991 -1993. The results show, the application of adequate potassium promote the absorption of nitrogen, phosphorus and potassium, synthetize and accumulation of amino acid in wheat plant. Adequate K-supply also increase the accumulative quantity of dry matter in various organ of wheat plant, promote the redistribution of carbonhydrate reserved in vegetative organ to reproductive organ, accelerate the absorption of nitrogen by plant after anthesis, increase the proportion of 15N assimilate distributed to grain and the content of protein and amino acid in wheat grain. All of those contribute to increase yield and improve grain quality.
出处
《作物学报》
CAS
CSCD
北大核心
1996年第4期442-447,共6页
Acta Agronomica Sinica
基金
国家自然科学基金
关键词
冬小麦
钾
养分吸收分配
产量
品质
Winter wheat
Potassium nutrient
Absorption and distribution of nutrition
15N assimilation
Yield and quality
