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首页> 外文期刊>日本作物學會紀事 >A Study of the Protective Effects of Irrigation against Frost-Injury in Mulberry Plants
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A Study of the Protective Effects of Irrigation against Frost-Injury in Mulberry Plants

机译：灌溉对桑树植物冻伤的保护作用

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1. Experimental plots of mulberry-field were irrigated with ground-water in late spring, and the damages in the plant by frost were examined in comparison with those in control plots unirrigated. 2. Irrigation was begun on April 10, 1954, and was continued thereafter, water being applied into the furrows every three days, in the amount of 30mm in depth for each time. 3. The first test-case of severe frost came on Apri1 21, and the second on April 28. Each night previous to the attacks, forecasted meteorologically, irrigation was intensified, by way of precaution, the depth of water applied being increased to 60 mm. 4. As the results of experiments, the damages in the plots irrigated proved decidedly small compared with those in the control plot unirrigated. 5. In the irrigated plots, the damage was rather severer in higher or younger boughs than in lower ones, while in the unirrigated plot, the relation was found inverse. 6. The rates of injury either in the number of boughs or in that of leaves were considerably larger in the irrigated plots than in the unirrigated plots. 7. The average minimum air temperatures observed at 1m above the ground were 1.6°C. in the irrigated plots, and 0.3°in the unirrigated plot. The initial temperature of the ground water used for irrigation was nearly constant at ca. 15°C.
机译：1.春天灌注桑树的实验局部灌溉底水，与未经灌进的控制图中的那些相比，检查植物损伤。 2.在1954年4月10日开始灌溉，此后继续，每三天用水施加到沟里，每次30毫米的含量为30mm。 3.严重霜冻的第一个测试案例于2011年4月21日，第二次进行了第二次。每晚攻击，预测气象学上，灌溉都会加剧，施加的水深增加到60毫米。 4.作为实验的结果，与未经诉讼的控制图中的数据相比，灌溉的地块的损坏明显小。 5.在灌溉的地块中，损害在更高或更年轻的树枝中比较低于较低的地块，而在未剪枪的地块中，该关系是逆的。 6.在灌溉的地块中，叶片数量或叶片的损伤率比在没有未剪切的图中的灌溉局部相当大。 7.在地面上方1米处观察到的平均最小空气温度为1.6°C。在灌溉的图中，在没有剪影图中的0.3°。用于灌溉的地面水的初始温度在CA几乎是恒定的。 15°C。

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