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以9a生红地球葡萄为试材,在晴天无风的环境下,探讨了土壤水分充足、中等干旱、重干旱3种不同土壤水分条件对葡萄日灼病及相关指标的影响。结果表明,土壤含水量越低,其气孔导度越低,土壤温度、叶片温度、果面温度越高,日灼病越严重。土层越深,地温日最大值出现的时间越晚、3个处理间地温差值也越小。重干旱处理的气孔导度峰值出现在8:00时,较其他2个处理前移1h,3种处理均在12:00-16:00时出现低谷。土壤水分状况对叶片温度变化有重要影响,土壤水分含量偏高时,叶片温度日最大值出现的时间相对较晚。3个处理间叶片温度日最大值的差值明显大于果面温度的差值。增加土壤水分对降低葡萄日灼病发生作用明显。
Taking 9-year-old Red Globe Grape as test material, the effect of three soil moisture conditions on sunburn and related indexes of grape was studied under the condition of fine weather without wind and with sufficient soil moisture, moderate drought and heavy drought. The results showed that the lower the soil water content, the lower the stomatal conductance, and the higher the soil temperature, leaf temperature and fruit surface temperature, the more severe the sunburn disease. The deeper the soil layer, the later the maximum temperature of the geothermal day appears, and the smaller the temperature difference between the three treatments. The stomatal conductance peak of heavy arid treatment appeared at 8:00, which was 1 hour earlier than that of the other two treatments, and the troughs of the three treatments all appeared at 12: 00-16: 00. Soil water status has an important influence on leaf temperature. When the soil moisture content is high, the leaf maximum temperature appears relatively later. The difference between the maximum daily temperature of leaves in three treatments was significantly larger than that of fruit surface temperature. Increased soil moisture on grape sunburn significantly reduce the role.