论文部分内容阅读
甜菜是临河市主要经济作物之一,由于其独特的自然条件(光照充足、温差大、灌溉方便等),平均亩产达3.5t以上,但近年来,含糖率出现明显下降趋势,由原来的17%降为15%,1990年最低降为13%,严重制约着甜菜制糖业的发展。为了探讨和研究临河地区在目前栽培条件下糖分下降的原因,进而为扭转含糖率下降局面提供一定的理论依据,从1993年开始对不同类型品种的甜菜进行不同时期主要生理指标的多点取样分析测定。
Sugar beet is one of the main cash crops in Linhe City. Due to its unique natural conditions (sufficient light, large temperature difference, convenient irrigation, etc.), the average yield per mu is more than 3.5t. However, in recent years, the sugar content has obviously decreased. The original 17% dropped to 15%, the lowest dropped to 13% in 1990, seriously constraining the development of sugar beet industry. In order to explore and study the reasons for the falling of sugar in Linhe area under the current cultivation conditions and to provide some theoretical basis for reversing the decline of the sugar content, multi-point sampling of main physiological indexes of different types of sugar beets at different periods has been carried out since 1993 Analytical determination.