荔枝园土壤肥力特征及其专用肥综合效应探析

对荔枝园土壤肥力特征及其专用肥综合效应研究结果表明 ,荔枝 (妃子笑 )园土壤树围土 (滴水线以内 )和裸地土 (滴水线以外 )土壤肥力之间存在明显差异 ,其中有效磷和有效钾比裸地提高 341.2 7%和 6 83.77%。中肥处理 (年施纯N 0 .4 6kg/株 )为合理施肥量 ,可提高树围土壤肥力 ,保持树体营养相对平衡 ,且挂果状况最佳。并提出修改荔枝专用肥配方建议 ,即适当降低专用肥中P、K比例 ,特别是促梢肥和促花肥

Soil fertility characteristics of litchi orchard and integrated effects of specialized fertilizers

The soil fertility characteristics of litchi orchard and its integrated effects of specialized fertilizers were studied. The results show that the soil fertility indices between the soil within the tree circle(tree-circle soil)and that outside the tree circle(bare soil)are much different,the available P and K of the former are increased by 341.27% and 683.77% than those of the latter respectively. The medium fertilization treatment can improve the soil fertility indices within tree circles,balance the nutritional status of litchi leaves,and reach the best fruit-setting status.Some suggestions of changing the recipe of the specialized fertilizer for green-food litchi are put forward,that is,the ratios of P and K are appropriately decreased in the specialized fertilizer,especially in the fertilizers for promoting shoots and flowers.