潮土区沙田柚配方施肥研究

Study on the equilibrium fertilization of Shatian pomelo in moisture soil area

对种植于潮土区的沙田柚,采用均匀设计,进行有机肥、氮肥、钾肥三因素五水平的配方施肥试验。试验结果表明:增施有机肥、氮肥与钾肥有助于改善沙田柚果实品质。对产量数据进行回归分析,得出最优施肥方案为:有机肥40 kg/株,N 2.6kg/株,P2O5 0.5kg/株,K2O 1.8 kg/株。沙田柚的叶片营养状况表明,在该施肥水平内,磷营养供应充足,而氮、钾素不足。

For the shatian pomelo which were planted on the moisture soil area, an equilibrium fertilization experiment was conducted and the 3 experimental factors at 5 levels were arranged by uniform design, the 3 factors included organic fertilizer, nitrogen chemical fertilizer and potassium fertilizer. The results show that increasing application of the organic fertilizer, the nitrogen chemical fertilizer and potassium fertilizer will be contributed to improve the quality of shatian pomelo fruit; the yield data was analyzed with regression analysis to screen the optimal fertilization formula as followings： organic fertilizer 40kg, N chemical fertilizer 2.6kg, P2O5 0.5kg and K2O 1.8kg per tree; the nutrient content of the shatian pomelo leaves suggested that at the optimal fertilization level, phosphorus was sufficient but nitrogen and potassium nutrient were deficient.