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为确定不同生态区最佳绿肥对象,通过大田小区试验研究不同绿肥翻压对玉米产量及对土壤性状的影响。结果表明:光叶紫花苕综合生物学性状较好,是提高玉米直径、长度与生物学产量及养分的较好绿肥,尤其在缺磷地区是较好的绿肥,但应提早掩埋时间,以提高玉米有效株数;紫云英是提高玉米籽粒产量、秸秆产量的较好绿肥;小麦对板结的粘土改良有积极意义,小麦与黑麦草应提早播种期,黑麦草在缺磷地区是较好绿肥;箭筈豌豆是提高土壤微生物及酶活性的较好绿肥,综合生物学性状较好;肥田萝卜是改良酸化土壤与提高生物学产量及养分的良好绿肥,在缺磷地区是较好绿肥。以综合指标来看,箭筈豌豆是湘西州绿肥种植较适宜对象。
In order to determine the best green manure in different ecological regions, the effects of different green manure compression on corn yield and soil properties were studied by field plot experiments. The results showed that the comprehensive biological characters of F. barbarum were better, which was a good green manure to improve corn diameter, length and biological yield and nutrients, especially good green manure in the phosphorus deficiency region. However, the burying time should be increased to increase The effective number of maize; Astragalus sinicus is to improve corn grain yield, straw yield better green manure; the improvement of the clay on the knot of the wheat has positive significance, wheat and rye should be sown early, ryegrass in phosphorus-deficient areas is a good green manure; Arrowheadia pea is a better green manure to improve soil microorganism and enzyme activity, and has better comprehensive biological characters. Manitou radish is a good green manure to improve acidified soil and improve biological yield and nutrients, and is a good green manure in the phosphorus deficiency area. In terms of comprehensive index, arrowhead peas is the suitable object for planting green manures in Xiangxi.