不同母质土壤养分及其对橡胶苗生长影响研究

用4种橡胶园土壤进行温室盆栽试验，研究了4种土壤的养分变化及其对橡胶苗生长的影响。结果表明，施肥处理与不施肥处理，土壤速效氮与速效磷变化幅度均表现为砂页岩最大而玄武岩最小，土壤速效钾变化幅度均表现为浅海沉积物＞玄武岩＞砂页岩＞花岗岩，从总体上看，不同母质发育的土壤对橡胶苗的苗高、地径生长的影响显著，其中以砂页岩发育的土壤上的橡胶苗生长最好，而在浅海沉积物土壤生长最差。

Effect of Nutrients from Different Soil Parent Materials on the Growth of Rubber Seedlings

Rubber seedlings were pot cultured with and without fertilizer on the soils derived from 4 different parent materials to observe their growth. The results indicated that in fertilizer treatment and non-fertilizer treatment, the change in soil available N and available P was highest in sandy shale and lowest in basalt, and that the change in soil available K was in the order of neritic deposit > basalt > sandy shale > granite. Generally soils derived from different parent materials gave notable impact to the development of plant height and stem diameter at the base. Rubber seedlings grew the best on the sandy-shale derived soil but the poorest in the niritic deposit derived soil.