薪炭林地土壤物理特性及养分状况研究

THE STUDY ON THE SOIL PHYSICAL CHARACTERISTIC AND NUTRIENT CONDITION OF FUEL-FOREST LAND

通过对黄土高原薪炭林地土壤的对比分析表明:试区土壤为黄绵土土体构型,质地为轻壤土或中壤土质;随着林木生长年限的增加,薪炭林地土壤水稳性团粒结构含量比农地对照提高了7.5%;土壤有机质也有明显地改善和提高;土壤水解氮的含量,以豆科柠条、刺槐、紫穗槐等树种林地含量高于山杏、沙柳等其它树种林地的含量;还对林地有效水的含量及利用状况、土壤的渗透特征进行了探讨。

By soil contrast analysis of fuel-forest lands,the result shows: The soil of the experimental area was the Huangmian soil form,who- se texture was a light loam or a medium loam.With the growth age of trees increasing,the soil waterstable aggregate content of fuelforest land rose by 7.5% as against the farming land which was regarded as the check land,and there was also a obvious improve- ment in soil organic matter.The hydrolyzable nitrogen content in the forest lands of the leguminous trees including Korshinsk Pea- shrub,Black Locust,Shrubby Falseindigo,etc.,was higher than that in the other forest lands of the trees including Siberian Apricot, Mongolian Willow,etc.An approach on soil available water content, utilization status,penetrability of fuel-forest land also was studied in this paper.