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小麦生育后期叶面追施氮肥,显著地提高小麦后期功能叶的光合强度,硝酸还原酶活力;旗叶总氮含量和叶绿素含量;有效地防止了功能叶的早衰,产量增加18.1—34.6%,籽粒蛋白质含量增加38.9—116.5%;单位面积的蛋白质收获量增加近两倍;此外穗部性状也大大改善。这些结果充分表明;在小麦生育后期叶面追施氮肥有很好的效应,尤其在品质改良上将做出贡献。
Nitrogen fertilizer topdressing of wheat at late growth stage significantly increased the photosynthetic activity and nitrate reductase activity of functional leaves in late stage of wheat; total nitrogen content and chlorophyll content of flag leaves; Premature premature decline of functional leaves was effectively prevented, yield increased by 18.1-34.6% Grain protein content increased 38.9-116.5%; protein yield per unit area increased nearly tripled; in addition ear traits also greatly improved. These results fully demonstrate that top-dressing nitrogen fertilizer has a good effect on the foliage in the later stages of wheat growth, and especially it will contribute to the quality improvement.