钼肥对小麦体内氮,钼营养影响的研究

取湖北省主要麦产区土壤在两个施氮水平下进行小麦施钼盆钼盆栽试验，结果表明：缺钼时小麦体内ＮＯ３－Ｎ转化ＮＨ４＾＋－Ｎ的过程受阻，植株缺少可利用态氯，而ＮＯ３＾－－Ｎ含量剧增。小麦放施钼可明显改善其体内的钼营养和氮营养，主要表现在：小麦各部位的钼的含量和吸钼量显著增加，硝酸还原酶活性（ＮＲＡ）平均增加６．５８倍，促进ＮＯ３－Ｎ转化，以及茎叶中的氮素向籽粒中转移和籽粒中游离态氮向蛋白态氮的转化。籽粒中

EFFECT OF MOLYBDENUM FERTILIZER APPLICATION ON THE NITROGEN AND MOLYBDENUM NUTRITIONS OF WHEAT

Seven upland soils, which were sampled from main wheat produce areas in Hubei province, were utilized to study the effect of application of MO fertilizer to wheat on N and Mo nutritions with pot culture method. The main results are as follows : when Mo was deficiency, the obstruction of wheat growth caused by both NO-Naccumulation and available N HH4+-N deficiency, Mo fertilizer application could improve N and Mo nutrtios of wheat, which included the increase of Mo value and uptake amount in wheat organs; stimulation of nitrate reductase activity (NRA) and prevention of the acumulation of nitrate, Applying Mo also speeded nitrogen translocation from wheat stem and leaves to its grains and stimulated nitrogen transformation from free N to protein-N. All these acted on the grain quality.