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我们在小棚和大棚内地面覆盖黑色薄膜和透明薄膜,观察它对土壤温度等小气候条件的影响和对黄瓜生长、发育的作用。从初步获得的结果看,地面覆盖可以提高土壤温度、保墒;还可降低相对湿度、改变局部空间的光照强度。从而促进了黄瓜根系的生长,增加早期产量。一、地面覆盖的小气候效应(一)对土壤温度和水分的影响:地面覆盖对土壤的增温作用,晴天要比阴天显著。据5月上旬测定,晴天地面覆盖透明薄膜,5—15厘米土层日平均温度可以提高1.1—1.8℃,20厘米土层仅增高0.75℃。地面覆盖黑色薄膜,仅5厘米土层温度稍有提高,其它土层比对照大约降低0.5—1℃。阴雨天覆盖透明薄膜,5、10、15厘米土层温度约提高0.5℃左右。对
We covered the black film and the transparent film in the shed and in the shed, observing its effect on microclimate conditions such as soil temperature and its effect on the growth and development of cucumber. From the preliminary results, the ground cover can improve the soil temperature, moisture; but also reduce the relative humidity, change the local space light intensity. Thus promoting the cucumber root growth and increase early yield. First, the microclimate effects of ground cover (A) of the soil temperature and moisture effects: the effect of ground cover on soil warming, sunny than the cloudy day significant. As measured in early May, sunny day covered with transparent film, 5-15 cm soil layer average daily temperature can be increased 1.1-1.8 ℃, 20 cm soil layer increased by only 0.75 ℃. The ground covered with black film, only 5 cm of soil temperature slightly increased, other soil layer about 0.5-1 ℃ lower than the control. Rainy days covered with transparent film, 5,10,15 cm soil temperature increased by about 0.5 ℃. Correct