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上海西部地区的低产土壤青紫泥土,地下水位过高,土质粘重,通透性差,作物根系生长不良,产量低。但这种土壤保水保肥力强,潜在养分高,如能在解决排水的基础上进一步改良其物理性状,那对发挥该种土壤潜在肥力,增加作物产量具有重要意义。据了解,本市发电厂的粉煤灰,除少部分用于建筑材料外,绝大部分要用船运到吴淞口外倒入海中,费用很大。据我们分析,煤灰中粒径>0.125毫米的粗颗粒约占75.6％,我们设想以“掺砂子”的方法将其施入粘性土壤,改良土壤物理性质,提高作物产量。64～65年我们曾在松江县金山公社凤凰大队作过此项试验,效果很好,现简介如下。
Low-yielding soil blue-purple soil in western Shanghai has too much groundwater level, thick soil, poor permeability, poor crop root growth and low yield. However, this kind of soil is water-conserving and fertile with high potential nutrients. If it can further improve its physical properties on the basis of drainage, it is of great significance to exert its potential fertility and increase crop yield. It is understood that the city of fly ash plant, with the exception of a small part for the construction materials, the vast majority of shipping to the Wusong mouth into the sea, the cost is large. According to our analysis, 75.6% of the coarse particles with particle size> 0.125mm in coal ash are assumed. We envisaged applying “sand-mixing” method to sticky soil to improve soil physical properties and increase crop yield. 64 to 65 years We had Songjiang County Jinshan commune Phoenix Brigade made this test, the effect is very good, are as follows.