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以西瓜为试材,针对压砂保墒问题,选择压砂时期和灌溉定额作为研究因素,采用对比试验方法研究了压砂保墒效果及其种植西瓜的生产潜力。结果表明:压砂覆盖能够有效保持土壤水分,上年雨季前压砂与雨季后压砂相比较,播种初期前者处理土壤质量含水率可达10.8%以上,而后者仅为8.9%;补水条件下前者比后者处理西瓜纵径大2.8cm,西瓜横径大3.1cm,未补水条件下前者比后者处理西瓜纵径大3.9cm,西瓜横径大2.7cm;补水条件下,前者处理西瓜产量为12 301.0kg·hm~(-2),后者处理西瓜产量为7 549.1kg·hm~(-2),未补水条件下,前者处理西瓜产量为6 723.3kg·hm~(~(-2)),后者处理西瓜产量为3 829.5kg·hm~(-2),可见,压砂保水能够明显提高西瓜生产潜力。
Taking watermelon as test material, according to the question of sand preserving soil moisture, selecting the period of sand compaction and irrigation quota as the researching factors, the comparative experiment method was used to study the effect of preserving soil moisture and the production potential of watermelon. The results showed that the sand cover could effectively keep the soil moisture. Compared with the sand pressure before the rainy season last year, the sand moisture content of the former was up to 10.8% while the latter was only 8.9% The former than the latter processing watermelon vertical diameter 2.8cm, watermelon horizontal diameter 3.1cm, without water under the conditions of the former than the latter watermelon vertical diameter 3.9cm, watermelon horizontal diameter 2.7cm; under the conditions of water supply, the former to deal with watermelon production (12 301.0 kg · hm -2), and the latter produced 7 549.1 kg · hm -2 watermelon. Under the condition of no water replenishment, the yield of watermelon was 6 723.3 kg · hm -2 )), The latter processing watermelon yield of 3829.5kg · hm -2, we can see that sand water can significantly improve the watermelon production potential.