石灰和磷肥对酸性土壤中野生油茶幼苗生长及土壤酶活性的影响

Effects of Lime and Phosphorus Fertilizer on Wild Seedlings Growth of Camellia oleifera Abel. and Enzyme Activity of Soil Enzyme

以酸性红壤为基质,研究酸性土壤中石灰和磷肥的施用对野生油茶(Camellia oleifera Abel.)幼苗生长及根际与非根际土壤酶活性的影响。结果表明,石灰和磷肥的施用能在不同程度上缓解土壤高铝低磷对野生油茶幼苗生长的毒害作用;磷肥能降低根际与非根际土壤的脲酶活性,石灰能在一定程度上缓解这一作用;石灰和磷肥共同施用能提高土壤酸性磷酸酶活性。说明磷肥和石灰共同施用能改善土壤环境,减缓铝毒对植物生长的抑制作用。

Effects of lime and phosphorus fertilizer application on seedling growth of wild Camellia oleifera Abel and enzyme activities of soil in the rhizosphere and non-rhizosphere were studied in pot experiments with medium of acid red soil. The results showed that application of lime and phosphorus could alleviate the Al toxicity and low-P stress on Camellia oleifera Abel. seedling growth to some extent. Phosphorus fertilizer application reduced urease activity of soil in C. oleifera Abel. rhi-zosphere and non-rhizosphere, while lime could relief this effect. The acid phosphatase activity would be enhanced when lime and phosphorus fertilizer were used in combination. These results indicated that employing phosphate fertilizer and lime to-gether could improve the soil environment and relief the aluminum toxicity press on plant growth.