EFFECS OF QUADRATE SIZE AND NUMBER ON PRECISION ESTIMATING LITTER AMOUNT OF SECONDARY FOREST
样方面积和数量对测定次生林凋落物精度的影响

This study is carried out in secondary forest of Betula plctyphylla.Ey analyzing the distribution featines of litter amovnt on forest fleer . it is discovered that there are some characteristics of non-normal distribution , in the intervals (about green weight X ±1.5Sx-) there are some features of uniform distribution for litter amount ,on forest floor. While estanrating litter amount , the required minmum quadrate number is almost the same as quadrate size exceeds 0.5m2 on a 27° hillside. Therefore, it is ...