荔枝施用营养型酸性土壤改良剂的增产改土效果

Yield-increasing Effect Modifier Application on Litch and Soil Improvement

连续3年定点试验表明:施用营养型酸性土壤改良剂后,荔枝(Litchi chinensis)产量显著提高。东莞村点1999年增产11.30～21.80kg·株^(-1),2000年增产20.00～26.80kg·株^(-1),2001年增产19.90～26.10kg·株^(-1);从化佐村点1999年增产2.90～9.80kg·株^(-1),2000年增产1.30～5.00 kg·株^(-1),2001年增产1.70～8.20kg·株^(-1)。施用土壤改良剂后,荔枝园土壤理化性状也得到明显改善,表现为土壤 pH提高,交换性 Ca、Mg 含量增加。从化佐村点土壤碱解 N、有效 P(P_2O_5)和速效 K(K_2O)含量分别提高50.77%、333%、108%,东莞村点土壤碱解 N、有效 P(P_2O_5)和速效 K(K_2O)含量分别提高37.5%、233%、74.8%。

The result of field experiment uninterrupted for three years showed that: when soil modifier was applied,litchi yield increased clearly.In huangcun site in Dongguan,litchi yield increased about 11.30～21.80 kg per individual plant in 1999, and 20.00～26.80 kg per individual plant in 2000, and 19.90～26.10 kg per individual plant in 2001.In zuocun site in Conghua,litchi yield increased about 2.90～9.80 kg per individual plant in 1999, and 1.30～5.00 kg per individual plant in 2000, and 1.70～8.20 kg per individual plant in 2001. Moreover, soil nutrient status improved such as soil pH,exchangeable Ca, exchangeable Mg advanced, and active N, active P_2O_5, active K_2O increased when soil modifier was used.