含氮化合物是树体重要的组成物质,它对树木的生长发育起着十分重要的作用。树木生长期内叶片中氮化物水平的高低往往反映出树木的营养状况和物质代谢的旺盛程度。而硝酸还原酶(NR)是植物氮素代谢中的关键酶,它与植物利用氮素能力有关,它的含量与活力影响着硝态氮转化的强度和速率,而且硝酸还原酶对其它代谢 (如光合、呼吸碳代谢和能量代谢等) 都有很大影响。实际上,施氮肥增产就 Nitrogen compounds are important components of the tree, which plays a very important role in the growth and development of trees. The level of nitrogen in the leaves during the tree growth period often reflects the nutritional status of trees and the exuberant degree of material metabolism. Nitrate reductase (NR), a key enzyme in plant nitrogen metabolism, is related to the ability of plants to utilize nitrogen. Its content and vigor affect the intensity and rate of nitrate nitrogen transformation. Nitrate reductase (NO) Such as photosynthesis, respiratory carbon metabolism and energy metabolism, etc.) have a great impact. In fact, nitrogen fertilizer on the yield