香蕉营养规律的研究

 通过对海南美台地区高产香蕉从种植至收获全生长期的养分跟踪分析,研究香蕉的营养变化规律及其适宜营养诊断部位。研究结果表明：（1）香蕉各营养器官及不同月份的大中量元素的养分含量存在着明显的差异。其全株平均的养分含量从大到小排列为：K＞N＞Ca＞P,Mg,S;P＞S;花芽分化期前S＞Mg,之后Mg＞S;果实发育成熟期前P＞Mg,果实发育成熟期P与Mg相近。(2)香蕉氮素、磷素、钾素及镁素的适宜诊断部位为叶片。（3）全株平均的养分含量比例为N∶P∶K∶ Ca∶Mg∶S＝1∶0.07～0.13∶1.80～3.90∶0.26～0.54∶0.03～0.14∶0.04～0.07。(4)生殖生长阶段,随着株龄的增加,香蕉N,P,K,S的含量均有规律下降,Mg含量增大,Ca含量较稳定。

Studies on the Nutrition Characteristics of Banana

By analyzing the contents of N, P, K, Ca, Mg and S of banana in Meitai, Hainan province,bananas nutrition characteristic and its most suitable nutrition diagnosis parts were studied. The results showed: (1)The nutrient contents of the banana vary with months and with organs, the nutrient contents in whole banana plant follows the order of K>N>Ca>P,Mg ,S; P>S; before floral initiation S>Mg, later Mg>S; P content is similar to Mg in fruit mature period, before which it is P>Mg. (2)Leaf are identified as the diagnosis parts of nitrogen, phosphorus, potassium and magnesium contents. (3)The ratio of nutrient elements in banana plant is N∶P∶ K∶Ca∶Mg∶S＝1∶0.07～0.13∶1.80～3.90∶0.26～0.54∶0.03～0.14∶0.04～0.07. (4)During the stage of reproduction, the N, P, K and S contents of banana drops with increasing of the age regularly. Mg content increases, Ca content is relatively steady.