作物组织中的氮是由新吸收的和已分配到各个组织中再经转移的氮组成的。这一推论已在水稻植株和大豆叶片内得到证明。也有人提出,氮的这两个来源显示出氨基酸对水稻成长中的叶片所起的作用是不同的。本研究在于表明小麦不同时期吸收氦的特 Nitrogen in crop tissues consists of freshly absorbed nitrogen that has been distributed to various tissues and then transferred. This corollary has been demonstrated in rice plants and soybean leaves. It has also been suggested that these two sources of nitrogen show that the role of amino acids in growing rice leaves is different. This study is to show that different periods of wheat helium absorption