黑龙江三江平原白浆土的肥力特征

白浆土肥力特征表现在腐殖质含量表层高于下层;HA/FA 比值在 A_1层是大于1,其余各层均小于1,尤其白浆层比值最小;胡敏酸 C/H 比要远远高于富啡酸;胡敏酸的羧基、醇羟基、醌基、总酸度都小于富啡酸。土壤氮素含量变化与有机质含量变化的趋势一致,土壤潜在供氨能力强,但氮素形态复杂,而且多变。土壤微酸性,对微量元素溶解有利。代换量较高,盐基饱和度在60%以上。以上肥力特征与生态环境和成土条件有关。

FERTILITY CHARACTERISTICS OF ALBIC PLANOSOL IN THE THREE-RIVER PLAIN OF HEILONGJIANG PROVINCE

The fertility characteristics of albic planosol are as follows:hu- mus content of surface soil is higher than below,HA/FA of A1 horizon is hi- gher than 1 and the other horizons are lower than 1,and the lowest is the albic horizon.C/H of humic acid is much higher than fulvic acid,but carboxyl grou- p,alcoholic OH,quinolic group and total acidity are lower than the later.The tendency of nitrogen content variation is in accordance with organic matter va- riation,and the potential nitrogen supply ability is hi...