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本文对中国热带农业科学院试验场三队和四队的16龄和22龄的热研7-33-97橡胶人工林水文循环中磷素流失的变化规律进行了初步研究,结果显示:(1)在3月份的第一次产流中地表径流流失的磷素量占全年流失总量的42.35%～50.67%。(2)树龄长的树干径流较多,22龄比16龄高3.01%,磷素含高12.32%。(3)树龄长的穿透雨量少,16龄比22龄高29.3%,但在穿透雨中磷素的含量22龄比16龄高0.96%。
In this paper, we first conducted a preliminary study on the variation of phosphorus loss in the hydrological cycles of the 16th and 22nd heats of the 7- and 7-33-97 rubber plantations of the third and fourth teams of the Chinese Academy of Tropical Agricultural Sciences. The results showed that: (1) The amount of phosphorus lost to surface runoff in the first runoff in March accounted for 42.35% ~ 50.67% of the total loss in the whole year. (2) The tree trunk with longer age had more runoffs, the age of 22 was 3.01% higher than the age of 16 and the content of phosphorus was 12.32%. (3) There was less penetration rainfall in the tree age, 29.3% higher in age 16 than in age 22, but the content of phosphorus in penetrating rain was 0.96% higher than that in age 16.