陈紫荔枝施肥量的研究

Studies on the fertilizer requirement of Chenzi litchi

通过测定陈紫荔枝鲜果的N、P、K、Ca、Mg含量 ,根据目标产量摄走的诸营养元素含量 ,估算根、茎、叶生长及落花落果消耗的营养元素 ,参考诸营养元素的吸收率 ,提出 6 6 7m2 面积产 1吨荔枝的推荐施肥量 :N 14～ 16kg、P2 O56～ 8kg、K2 O 18～ 2 0kg、CaO 7～ 9kg、MgO 4～ 6kg。N∶P2 O5∶K2 O∶CaO∶MgO比率为 1∶0 4～ 0 5∶1 3∶0 5～ 0 6∶0 3～ 0 4。建议有机肥占总施肥量的 4 0 %～ 5 0 %为宜。

The rational rate of fertilizer application on Chenzi litchi was investigated in this paper.The content of N,P,K,Ca and Mg in the Chenzi litchi fruits was determined.Based on the uptake amount of nutrient element of fresh fruits,roots,branches,leaves,abscised flowers and fruits,and fertilizer uptake rate,the suggested fertllizer for requirement 667m 2 producing 1 ton of fresh fruit is N 14～16kg?P 2O 56～8kg?K 2O 18～20kg?CaO 7～9kg?MgO 4～6kg.The ratios of N∶P 2O 5∶K 2O∶CaO∶MgO are 1∶0 4～0 5∶1 3∶0 5～0 6∶0 3～0 4.It is suggested that organic manure should account for 40%～50% of total fertilizer requirement.