钾的缺乏最为突出, 即使轻度黄化叶片, 其钾含量仅为高产叶片平均含量的15.3%,, 低产叶片平均含量的22.5%, 同时, 轻度黄化叶片和重度黄化叶片的钾含量相差甚微; 其次是氮, 轻度黄化叶片, 其氮含量为高产叶片平均含量的56.7%,, 低产叶片平均含量的89.6%, 同时, 轻度黄化叶片和重度黄化叶片的氮含量相差11.6%; 磷最小, 轻度黄化叶片, 其磷含量为高产叶片平均含量的73.9%,, 低产叶片平均含量的89.1%, 因此, 引起海南槟榔叶片黄化第一个因素, 应该是钾, 第二个因素是氮。由此表明, 槟榔叶片黄化可能由于缺钾与缺氮引起复合症状上海翻译公司。

Potassium shortage is the most outstanding, even the light yellowing leaf, its potassium content is only 15.3% of average content of high yield leaf, 22.5% of average content of low yield leaf; meanwhile, potassium content difference between light yellowing leaf and severe yellowing leaf is little; nitrogen comes second, its nitrogen content of light yellowing leaf is only 56.7% of average content of high yield leaf, 89.6% of average content of low yield leaf; meanwhile, nitrogen content difference between light yellowing leaf and severe yellowing leaf is 11.6%; phosphorus is the smallest, phosphorus content of light yellowing leaf is 73.9% of average content of high yield leaf, 89.1% of average content of low yield leaf; therefore, the first factor for causing the leaf yellowing of Areca catechu L. in Hainan Province should be potassium, the second factor is nitrogen. This shows that leaf yellowing of Areca catechu L. may cause the complex symptom due to lack of potassium and nitrogen.

通过对槟榔叶片氮、磷、钾配比(N:P:K)分析结果表明在槟榔生长过程中, 氮含量最大, 钾次之, 磷最小。不同生产管理水平槟榔叶片N:P:K比值表现出一定的差异, 随着槟榔产量下降, 其叶片中磷和钾比例有所上升, 也就说, 氮含量随着槟榔产量下降而有所降低, 因此在槟榔生长中, N含量高低对槟榔产量影响较大。在种植槟榔过程中, 应重施氮肥和钾肥, 适当地附加磷肥, 以满足槟榔生长发育和结果所需要的养分。对应现处于较低产量的槟榔组应及时补充氮肥。对于现处于高产量槟榔组应定时考察土壤养分和植株营养条件状况, 合理和科学管理和施肥北京翻译公司。

The analysis result for the ratio of nitrogen, phosphorus and potassium (N:P:K) in Areca catechu L. indicates that during the Areca catechu L. growth process, nitrogen content is the largest, potassium comes second, and phosphorus is the smallest. The ratio of N: P: K in Areca catechu L. under different production management levels shows up a certain difference; with the decrease of Areca catechu L. yield, phosphorus and potassium proportion is somewhat elevated, that is to say, nitrogen content is somewhat declined with the decrease of Areca catechu L. yield; therefore, during the Areca catechu L. growth, nitrogen content has a very large influence on Areca catechu L. yield. During the process of Areca catechu L. planting, heavily apply nitrogenous fertilizer and potash fertilizer, add the phosphate fertilizer appropriately, so that satisfy the nutrient required by the growth, development and fruit bearing of Areca catechu L. Supplement the nitrogenous fertilizer for the high yield Areca catechu L. in time. Investigate the soil nutrient and plant nutritional condition regularly for high yield Areca catechu L. group, conduct the management and fertilization reasonably and scientifically.