炼山对巨桉林地土壤全磷和有效磷含量的影响

Effect of Burning on Soil's Total and Available Phosphorus Contents in the Eucalyptus grandis Plantation

研究了四川省乐山市兴福寺和棉花山等地炼山初期、炼山后一年生、炼山后五年生巨桉林地土壤磷含量。结果表明,炼山对巨桉林地土壤全磷和有效磷含量的影响十分显著。炼山初期林地土壤全磷含量高于炼山后一年生和五年生巨桉林地土壤,而土壤有效磷含量则低于炼山后一年生和五年生巨桉林地土壤。炼山后一年生的巨桉林地土壤有效磷含量最高,而全磷含量则是炼山初期最高。说明炼山对巨桉林地土壤全磷和有效磷含量在短时间内有提高的作用,但随着时间推移全磷和有效磷含量都会下降。

Soil phosphorus content was measured in the eucalypt（Eucalyptus grandis） plantation with different burning treatment time（1-month,1-year and 5-year） in Xingfu temple and Mianhuashan in Leshan city of Sichuan province.Burning had great influence on soil total and available phosphorus contents in the eucalypt plantation.The content of soil total phosphorus in early days of burning was higher than that after 1 and 5 years of burning.But the content of soil available phosphorus in early days of burning was lower than that after 1 and 5 years of burning.The content of soil available phosphorus after 1 year of burning was the highest,while the content of soil total phosphorus in early days of burning was the highest.These results showed that burning could improve the content of soil total and available phosphorus of eucalypt plantation in a short time,but the contents would decrease in many years after burning.