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朝阳地区低山丘陵的坡耕地褐土有570万亩,单产粮谷仅150公斤左右.肥力低的特征可概括为瘦、薄、硬、粘、旱等五方面,造成现状的直接原因是:水土流失,每亩年流失量1吨左右;作物平均携出N2.6,P_2O_50.8～2.1,K_2O2～3公斤/亩,缺乏归还;氮素挥发损失;化肥氮加速土壤有机质消耗;燃料缺乏,有机物质不能还田,物质和能量不平衡,生态环境失调恶化.立足于生态观点改良利用褐土的主要措施是:调整农林牧比例;发展绿肥牧草;搞好水土保持;增施化肥,发展灌溉.
Cultivated land in the low hills of the Chaoyang area has a total of 5,700,000 mu of cinnamon soil and a grain yield of only about 150 kg. The characteristics of low fertility can be summed up in five aspects such as thin, thin, hard, sticky and dry. The direct causes of the current situation are: The annual loss of soil and water per mu is about 1 ton. The crops carry an average of N2.6, P_2O_50.8 ~ 2.1, K_2O2 ~ 3 kg / mu, lack of restitution, loss of nitrogen volatilization, chemical nitrogen fertilizer accelerates the consumption of soil organic matter, and lack of fuel , The organic matter can not be returned to field, the imbalance of matter and energy, and the deterioration of ecological environment are the main measures to improve the utilization of cinnamon soil based on the ecological point of view: adjusting the proportion of agriculture, forestry, animal husbandry, green forage grass, improving soil and water conservation, irrigation.