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连续 3 a试验研究结果表明 ,陕北丘陵沟壑区旱梯田采取双料沟垄组合覆盖 ,可明显改善土壤水、气、热环境状况。通过减少裸露地表的无效蒸发 ,加快植株生育进程 ,缓解土壤温度的巨变 ,增加土壤有机质含量 ,从而提高降水利用率 ,为谷子的增产创造良好的土壤环境。试验谷子采取双料沟垄组合覆盖措施 ,较对照平均增产 67.9% ,比地膜覆盖增产 1 1 .8%。
The results of 3 consecutive years of experiments show that the double ridge and ridge combination covers the terrace in the hilly and gully regions of northern Shaanxi, which can obviously improve the water, gas and thermal environment conditions. By reducing the ineffective evaporation of the bare surface, the process of plant growth can be accelerated, the temperature change of the soil can be alleviated, the content of organic matter in the soil can be increased, the utilization rate of precipitation can be increased, and a favorable soil environment can be created for the increase of millet. The experimental millet adopted double ridge and ridge combination coverage measures, which increased 67.9% on average compared with the control, and increased by 11.8% compared with the mulching.