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旱地小麦整个生育期间,从起身到拔节、灌浆期需水最多,而这个时期的降水只能满足小麦需水的一半,其余一半则要靠土壤的深层蓄水供给。但是旱垣地区在长期浅耕条件下,形成了一个坚硬的犁底层,成为雨水下渗的“隔水层”。因此,我们必须首先想法突破这个犁底层,逐年加深活土层,以期抓住伏里饱蓄天上水,恢复、补充深层上壤蓄水,使之成为旱地小麦高产的基础水。据了解,一般情况下,除去汽化蒸发,在2米深土层内可蓄有效水200毫米,即133立方,等于在土壤深层建立了一个蓄水库。
During the whole growing period of dryland wheat, the water demand during the filling stage is the highest from the beginning to the jointing stage, while the precipitation during this period can only meet half of the demand of wheat and the rest depends on the deep water supply of the soil. However, under the condition of long-term shallow tillage, the Aridang region formed a hard plow bottom and became the “aquitard” for infiltration of rainwater. Therefore, we must first break through the plow the bottom of the ground, deepen the living soil year by year, with a view to seize the sky to fill the sky, restore, replenish the deep soil water storage, making it a high yield of dryland wheat base water. It is understood that under normal circumstances, in addition to vaporization evaporation, in the 2-meter deep soil can be effective water 200 mm, or 133 cubic meters, equivalent to the establishment of a deep reservoir in the soil.