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一、引言生产实践及有关研究表明:在我省以旱作为主的情况下,气象条件特别是降水量是造成大范围小麦产量逐年波动的重要因子,其中又以决定底墒的秋季降水和拔节期前后的降水与产量的关系密切。但是它们对产量影响的程度,至今尚不明确。为了搞清春季关键期降水与冬麦产量的定量关系,以便充分利用气候资源、准确地预测产量及采取有
I. INTRODUCTION Production practices and related studies show that under the drought-dominated conditions in our province, meteorological conditions, especially precipitation, are important factors that cause large-scale wheat production to fluctuate year by year. In addition, autumn precipitation and jointing stage Before and after precipitation and production are closely related. However, the extent of their impact on production is still not clear. In order to clarify the quantitative relationship between spring precipitation and winter wheat yield in order to make full use of climate resources, accurately predict the yield and adopt