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在集约化学化条件下,农作物的增产量中至少有一半是来自化学肥料。随着农业生产投资的不断增加,提高化肥的农业和经济效益,以及重视农产品质量的改善,都是十分重要的问题。正确和科学地供应农作物一切必要的无机营养元素对进一步提高农作物产量,改善产品质量,有着特殊的意义。当氮、磷、钾、钙和镁肥供应充足时,不仅作物品种,光照强度,供水数量,而且某些微量元素的缺乏,都可能限制作物的增产。应用微量元素肥料的理论只是在证明了微量元素是各种酶复合体的成分之后才得到公认的,目前这一理论还在深入研究中。微量元素之所以具有良好的作用,是因为它们参加氧化还原过程和醣及氮的代谢过程,能提高作物对病害和外界不良因素的抵
Under intensive chemical conditions, at least half of the increase in crop yields comes from chemical fertilizers. With the continuous increase of investment in agricultural production, it is a very important issue to increase the agricultural and economic benefits of chemical fertilizers and to pay attention to the improvement of the quality of agricultural products. Correct and scientific supply of all necessary inorganic nutrients for crops has a special meaning to further improve crop yields and improve product quality. When supplies of nitrogen, phosphorus, potassium, calcium and magnesium are abundant, not only crop varieties, light intensity, water supply quantities, but also the lack of certain trace elements may limit crop yields. The theory of the application of trace element fertilizers is only recognized after it has been proved that trace elements are the components of various enzyme complexes. At present, this theory is still under study. The reason why trace elements have a good effect because they participate in the redox process and sugar and nitrogen metabolism, can improve the crop disease and adverse external factors