干草原牧草贮藏碳水化合物含量变化规律的研究

The Study on Changing Patterns of Carbohydrate Reserves in Inner Mongolia Steppe Rangeland

１９９３年在内蒙古正蓝旗于草原对１０种牧草贮藏碳水化合物含量的变化规律进行了研究。在植物生长期内，每１５天采样一次，分析牧草茎基部和根部的总糖和还原糖含量。试验结果表明，牧草在返青时都要消耗贮藏碳水化合物，分蘖后开始积累贮藏碳水化合物，在拔节和抽穗时又要消耗贮藏碳水化合物，开花、结实后又积累贮藏碳水化合物。但有的牧草出现相反的情况。根据牧草贮藏碳水化合物含量变化的规律，作者对合理利用草地提出了一些意见和建议。

The changing patterns of carbohydrate reserves of ten forage plant species were studied in 1993 in thesteppe rangeland area of Zhenglan Banner Nimenggu, During growing season, all the samples in trial wererandomly taken and those carbohydtate reserves in stem bases and roots were determined. Our resultsshowed that the forage plants utilized their carbohydrate reserves(in the form of total sugar plus reduced sug-ar contents)at turning green,jointing and heading stages respectively and would accumulate the samereserves contents after tillering,blooming and fniit- bearing stages accordingly. The said patterns,how-ever, turned into the reversed trend in some forage species.Some rational suggestions were put forward bythe authors on the future utillzation of rangeland resources somewhat basing on the changing patternsmodeling variation existed in carbohydrate reserves.