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及时供给物物有效磷,对作物最大限度地生长是很重要的。有些资料指出,在冬小麦一生的关键时期,其体内磷的吸收对最大限度地生长是非常重要的。本研究的目的是:Ⅰ)确定冬小麦营养生长期间培养液中磷的移动性对干物质生产和磷吸收的作用。Ⅱ)比较冬小麦和已知春小麦需磷的形态。用一种改良的赫氏培养液,将“Centurk”冬小麦种在温室。以鉴别植物在生长期间对营养液中有磷和无磷的反应作为处理。这项工作的完成是通过用完全营养液代替缺磷的营养液,使作物继续生长直到生理成熟。冬小麦在起身期吸收足够的磷以保证成熟根系和地上部的最大干物质量,而生长后期有效磷则不能明显地增加成熟根系和地上部的干物质量。无论如何,只有当磷有效地维持到籽粒发育的乳熟期,才能获得成熟时的最高产量。拔节期以后仅需少量的磷以保证碳水化合物的转移。春小麦则不同于冬小麦,它仅在抽穗前需要大量的磷以形成最高产量。
Timely supply of available phosphorus, the maximum growth of crops is very important. Some sources point out that in the critical period of winter wheat’s life, the absorption of phosphorus in the body is very important for maximum growth. The purpose of this study is: Ⅰ) To determine the effect of phosphorus mobility in culture solution on dry matter production and phosphorus uptake during winter wheat vegetative growth. Ⅱ) Comparison of Phosphorus Forms in Winter Wheat and Known Spring Wheat. With a modified Herceville medium, “Centurk” winter wheat is planted in the greenhouse. To identify plants that have been treated for phosphorus and phosphorus-free reactions in the nutrient solution during growth. The work is done by replacing the phosphorus-deficient nutrient solution with complete nutrient solution to allow the crop to continue growing until it is physiologically mature. Winter wheat absorbs enough phosphorus during uptake to ensure maximum dry matter content in mature roots and aerial parts, while available phosphorus does not significantly increase the dry matter mass in mature roots and aerial parts during late growth stage. However, the highest yield at maturity can be achieved only when phosphorus is effectively maintained at the milky maturity of the grain. Only a small amount of phosphorus is needed after jointing to ensure carbohydrate transfer. Spring wheat is different from winter wheat in that it requires a large amount of phosphorus to produce the highest yield just before heading.