论文部分内容阅读
对南疆特定干旱气候条件下滴灌和漫灌的复播玉米冠层内温、湿度变化及光分布状况进行研究。结果表明,扬花期冠层内温度、光截获率在下午14:00时达最高,且相对湿度达最低,其日平均温度为30.0℃~31.9℃,日平均相对湿度为40.9%左右,群体平均光截获率为43.3%~46.1%。与漫灌相比,滴灌能提高复播玉米群体的相对湿度和光截获率,降低冠层温度和表层土壤温度,“平抑”地温,这种效应在生育后期更加明显。在灌浆期,滴灌处理群体平均温度较漫灌处理低1.05℃,相对湿度高4.63个百分点,光截获率高11.1个百分点。滴灌改善了复播玉米群体内温、湿度和光分布条件,增强长势,产量较漫灌提高14.95%,生育期推迟5 d左右,在生产中应注意早播或选用早熟品种,以免影响成熟。
The changes of temperature, humidity and light distribution in the canopy of drip irrigation and flood irrigation in arid climate of southern Xinjiang were studied. The results showed that the temperature and light interception rate at the flowering stage reached the maximum at 14:00 and the relative humidity was the lowest. The average daily temperature was 30.0 ℃ ~ 31.9 ℃ and the average relative humidity was about 40.9% Light interception rate of 43.3% ~ 46.1%. Compared with flood irrigation, drip irrigation can increase the relative humidity and light interception rate of the replanted maize population, reduce the canopy temperature and surface soil temperature, and “flatten” the ground temperature, which is more obvious in later growth period. During the filling stage, the average temperature of drip irrigation group was 1.05 ℃ lower than that of flood irrigation, the relative humidity was 4.63 percentage points higher, and the light interception rate was 11.1 percentage points higher. Drip irrigation improved the conditions of temperature, humidity and light distribution in the rewetted corn population, and increased the growth. The yield was increased by 14.95% and the growth period was postponed by about 5 d. Early maturing or early maturing varieties should be noticed in production so as not to affect maturity.