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辽宁北部黄土性母质上发育的耕作棕壤,多分布于缓坡丘陵。岗顶较平坦,坡度一般3～5度,很少超过10度。坡耕地常有不同程度的侵蚀,局部出现棕红色古老洪积冲积层。该类土壤约占全区耕地面积的三分之一,土壤肥力中等,经过整修梯田,植树种草,增肥改土,土壤肥力水平可有显著提高,产量成倍增长。本区生长期约125～135天,降雨量在500～600毫米左右,适合多种经营,有较大的生产潜力。 为了探讨不同肥力水平耕作棕壤的肥力特征及其调节途径,我们在该区昌图县二台子大队原有土壤普查的基础上,选定了不同肥力水平(高、中、低)的耕作棕壤,对其进行了土壤理化及生化性质测定。现将测定结果整理如下:
The cultivated brown earth developed on loessial parent material in northern Liaoning is mostly distributed in gentle slope hills. Gangding more flat, generally 3 to 5 degrees slope, rarely more than 10 degrees. Slope arable land often have different degrees of erosion, the local emergence of reddish brown alluvial alluvium. This type of soil accounts for about one-third of the total cultivated area in the whole region, with moderate soil fertility. After the renovation of terraced fields, planting trees and grasses, increasing soil fertility and improving soil fertility, the soil fertility level can be significantly increased and the yield doubled. The growing area of about 125 to 135 days, the rainfall of about 500 to 600 mm, suitable for a variety of businesses, have greater potential for production. In order to investigate the characteristics of fertility and its regulation of brown soil cultivated at different levels of fertility, based on the original soil survey of Ertaizi Brigade of Changtu County in this area, we selected cultivated brown (brown) cultivars with different fertility levels (high, medium and low) Soil, soil physical and chemical and biochemical properties of its determination. Now the measurement results are organized as follows: