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五年定位试验表明,水旱两熟稻田麦稻连作使土壤物理性状恶化,供肥能力降低,杂草大量增加,导致小麦显著减产.稻田新三熟具有显著减轻小麦连作障碍的作用.有利于改善土壤物理性状,提高土壤肥力和小麦对土壤养分的吸收利用能力,是提高两熟制小麦产量和克服连作小麦减产、提高资源利用率和社会、经济效益的有效途径.
Five-year positioning experiment showed that continuous cropping of wheat and rice in flood and drought stage aggravated the physical properties of soil, decreased the availability of fertilizers and increased the weeds in a large amount, resulting in significant decrease of wheat yield. Improving soil physical properties, increasing soil fertility, and wheat absorption and utilization of soil nutrients is an effective way to increase the yield of double-cropped wheat and overcome the yield reduction and the utilization of resources and social and economic benefits of continuous cropping.