乐陵金丝小枣区土壤原生矿物组成及其生态效应

乐陵金丝小枣区土壤原生矿物组成中，重矿物以角闪石-不透明矿物-帘石-辉石为主，其中不稳定矿物成分含量很高，与黄河中游地区黄土矿物组成十分相似，反映枣区土壤原生矿物与黄土有关。研究结果表明具有黄土特征的土壤是较好的矿质养分库，不同枣区沉积物的原生矿物组成和风化程度导致土壤养分有效性差异，这种差异同枣叶和鲜枣所含养分紧密相关。因此，在某种程度上可以说，枣区土壤原生矿物化学组成特征可以作为探寻枣树适宜区域的一种标志。

PRIMARY MINERAL COMPOSITION OF SOILS FROM JUJUBEGROWING AREAS IN LELING COUNTY AND ITS ECOLOGICAL EFFECT

In the soil primary mineral composition of jujube in Leling County, the heavy minerals chlefly consist of amphibole, opaque minerals, allanite and pyroxene. The unstable mineral con-tent is rather hlgh. They are very simllar to the loess mineral content in the middle reaches of the Yellow River. The characteristics indlcate that the soil primary mineral in jujube-growing areas is related to the loess. Our studies show that the soil with loess features contains more mineral nutri-ent reservoirs. The primary mineral content of deposits and the degree of weathering result in the effective difference in nutrients of jujube leaves and fresh jujube. Consequently, to a certain ex-tent, the chemical composition of the soil primary m1nerals may be an indicator for searching for suitable areas for jujube growing.