关键词: 亚高温, 亚高温, 番茄品质, 硼, 亚精胺, 缓解作用

Abstract: In order to more fully reveal decadal change characteristics of climate system in loess plateau of China, look for near-surface climate evolution, the author investigated the loess plateau area 33 climate items, with weather datum of 51 stations during 1960-2009 in China loess plateau, by applying weighted average and fractal dimension analysis to make clear the characters of ground climate system trend characteristic of China loess plateau. The results showed that: the temperature increased with symmetry evolvement. The trend of kinds of month temperature factor had different patter. The maximum temperature change was the most complex, so the minimum temperature was contrary. The rainfall and rain day had reverse directed trend in front a half year and behind a half year; that had obviously increased in June, so contrary in September. The continuum overcast and rainy reduced in autumn, ascended in spring; on the contrary in the connect un-rain period. In the rain climate factor, rain-day change was the most complex; the heaviest rainfall was simple. The wind speed became slow and the air vapor ascended in the loess plateau during 1960-2009. The sunlight time was decreased; mainly did in the spring, on the contrary in autumn. The trend of cloud and relative humidity was not inclining in the plateau; the cloud and relative humidity had increased in the front a half year, but one decreased in the behind a half year; specially different in spring and autumn. That the evaporating descended large extent particularly did in the front a half year; the evaporating had marketable correlation between other climate factors.