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一、柑桔树的氮肥肥效尽管树体大小和树龄不同对结果有一定的影响,但仍可获得一般的结论;成年果树每年干物质产量大约为100～300公斤(取决于树龄),其中70～90％为永久性部分,即构成枝、干、根系。氮素的分布与干物质分布不同,总吸氮量的30～60％分布在每年新生的部位(即果实和叶片因多数叶片每年都更新),这些新生部位的含氮量年度间也有明显的波动,波动幅度取决于树势状况。如氮素营养状况好的果树果实和叶片总含氮量为1.02公斤,而缺氮树的果实和叶片含氮量仅0.65公斤。
First, citrus tree nitrogen fertilizer efficiency Despite the tree size and age of different results have a certain impact, but still get general conclusion; annual adult fruit tree dry matter yield of about 100 to 300 kg (depending on age), of which 70 ~ 90% of the permanent part, that constitutes a branch, stem, root system. Nitrogen distribution is different from that of dry matter, with 30-60% of the total nitrogen uptake distributed in new parts of the year (ie fruit and leaves are updated annually for most of the leaves). Nitrogen content in these new parts is also significant Fluctuation, fluctuation depends on the state of the tree. For example, the total nitrogen content of fruit trees and leaves with good nitrogen nutrition was 1.02 kg, while that of nitrogen-deficient trees was only 0.65 kg.