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胶东丘陵区的山区旱薄地,约占全地区总耕地面积的10％。由于它土体薄、土质差,蓄水能力低,加之灌溉条件差,产量一直低而不稳。当地群众创造出“立足于土,着眼于水,紧跟上肥”的改土经验,改变了土壤性能,增产效果显著。现将他们的经验介绍如下: 一、扩大土壤蓄水量。土壤水分严重不足是阻碍山丘旱薄地提高产量的关键因素。为了增加土壤水分,他们逐年加厚土层,扩大蓄水容量,增加有机质,平整土地,疏松土壤,从而增强了土壤的保墒能力。旱薄地的土层一般逐年加厚至2.0—2.5尺,沙性的可比粘性的土壤
Jiaodong hilly mountainous area dryland, accounting for about 10% of the total area of cultivated land in the region. Because of its thin soil, poor soil quality, low water storage capacity, coupled with poor irrigation conditions, production has been low and unstable. The local people created the experience of soil improvement based on the soil, focusing on the water and keeping up with the manure, and changed the soil performance, and the stimulation effect was remarkable. Now their experience is as follows: First, to expand soil water storage. A serious shortage of soil moisture is a key factor hindering the increase of yield in the hilly area. In order to increase the soil moisture, they have increased their soil moisture capacity by thickening the soil layer each year, expanding the water storage capacity, increasing the organic matter, leveling the land and loosening the soil. Droughts of the soil generally thickened year by year to 2.0-2.5 feet, sandy comparable viscous soil