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农作物产量的波动是人们极为关注的问题。经验表明,这种波动往往与气候有密切联系。我区主要粮食作物夏玉米产量波动较大,为了更有效地挖掘增产潜力,实现夏玉米高产稳产,查明夏玉米产量起伏的热量指标,为采取相应措施提供依据很有必要。本文从本区热量特征,对夏玉米的播种期作一粗浅分析。一、我区热量特征与夏玉米生育我区西依太行山,南临黄河,属华北大
Fluctuations in crop yields are a matter of great concern to people. Experience shows that such fluctuations are often closely linked with the climate. In order to more effectively excavate the yield potential and achieve high and stable yield of summer maize and to ascertain the thermal index of summer maize yield fluctuation, it is necessary to provide the basis for taking corresponding measures. In this paper, the thermal characteristics of the region, the sowing of summer maize to make a superficial analysis. First, the thermal characteristics of my district and the summer corn fertility I West District Taihang Mountain, south of the Yellow River, is a large North China