【摘 要】
：
国内外的有关资料表明,甜菜过度施用氮肥是造成含糖量下降的主要原因之一。为了控制施 N 量,在甜菜生育期进行叶柄 NO_3—N 动态变化的测定,对指导甜菜合理施肥有其独特的意
【机 构】
：
甘肃农业大学,甘肃农业大学,甘肃农业大学农学系,甘肃农业大学,甘肃农业大学,甘肃农业大学 80级毕业生
论文部分内容阅读
国内外的有关资料表明,甜菜过度施用氮肥是造成含糖量下降的主要原因之一。为了控制施 N 量,在甜菜生育期进行叶柄 NO_3—N 动态变化的测定,对指导甜菜合理施肥有其独特的意义。但目前国内这方面的研究报道尚不多见。为此我们就甜菜生育期间叶柄 NO_3—N 的变化状况作了初步的探索、现将结果整理如下。
Relevant data at home and abroad show that over-application of sugar beet is one of the main reasons for the decrease of sugar content. In order to control N application rate, the determination of petiole NO_3-N in beet during its growth period has its unique significance to guide the rational fertilization of sugar beet. However, at present, there are few reports on this area in China. To this end, we made preliminary exploration on the changes of petiole NO_3-N during the growth of sugarbeet, and the results are summarized as follows.
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