新垦殖紫色土果园土壤熟化研究

Study on the Improvement of the Soil of the Newly Established Or－ chard on the Reclaimed Purple Soil

通过对紫色土新垦殖果园理化性状的测试和不同有机物料配比对土壤改良效果及对植株生长影响的观察，提出了对新垦殖果园土壤的改良应以有机营养为主。鲜体绿肥、秸秆能迅速分解提供果树所需的矿质氮素及其它营养元素，同时能有效地改善土壤的有机无机复合状况，提高新形成的腐殖质与土壤无机部分的复合；饼肥分解缓慢。适量的秸秆与绿肥配合施用，既有利土壤结构的改善，提高改土效果，又能增加腐殖质的矿化性，促进幼树生长。

According to the analysis of the soil physical and chemical properties of the newly established orchard on the reclaimed purple soil and the effect of different ratio of organic materials applied for soil improvement and the growth of the orange trees． It is recommended for improving the soil fertility of the orchard organic materials must be mainly applied． Result of experiments showed that the applied fresh green manure and straws could be decomposed quickly in the soil and increase the soil mineral nutrients which effectively improves the soil properties and increases the fertility of the soil． Applying oil cake in to the soil is not as good as applying fresh green manure and straws it is not so easily decomposed and being used by the trees．