红壤温州蜜柑园连续施石灰的效应

在湘南第四纪红色粘土母质发育的红壤温州蜜柑园连续6年施用石灰的试验结果表明,连年适量施用石灰可提高产量,与不施石灰处理相比增产13.2％～29.2％,品质亦得到改善。土壤和叶片测定结果显示,柑桔增产的原因,主要是施用石灰提高了土壤pH值,促进了土壤有机质的分解,增强了树体对土壤氮、磷元素的吸收。

Effect of Successive Application of Lime in the Red-soil Orchard of Satsuma

The experiment of successive application of lime for six years was carried out in the red-soil orchard of satsuma in Southern Hunan. The results showed that the annual moderate application of lime increases yield by 13. 2-29. 2% and improved fruit quality. The soil and leaf analyses showed that the raise of pH value of the soil after suceesive application of lime accelerated the decomposition of organic matter and increased the N ,P content in leaf so as to cause yield increase.