毛竹笋期的营养动态*

对不同时期毛竹笋的营养物质含量分析表明，蛋白质、氨基酸、脂肪、糖类等的含量是未出土生长的冬笋高于出土生长的春笋；水分、纤维素含量是冬笋期较为稳定，春笋期逐渐增长，矿质营养元素含量昃笋高于冬笋。从毛竹笋营养含量及产量考虑，宜在2月中旬到3月中旬采收冬笋；在3月下旬到4月上旬采收春笋较为理想。

NUTRIENT DYNAMICS IN THE SHOOT STAGE OF MAO BAMBOO

The contents of nutrient components of the shoots of Mao bamboo (Phyllostachys pubescens) at different periods were analysed. The results showed that the contents of protein, ammo-acids, fat and carbohydrates etc. of the winter shoots underground were higher than those in the spring shoots above ground; that of moisture and cellulose remained relatively stable in the winter shoots but increased gradually in the spring shoots, and that of mineral nutrient elements was higher in the spring shoots than that in the winter shoots. Therefore, it was suggested that the most suitable periods for bamboo shoots harvest were from the second ten days of February to second ten days of March for winter shoots, and from the last ten days of March to the first ten days of April for spring shoots.