Storage of Nonstructural Carbohydrates and Snow Enduarance in Winter Annual Forage Crops : I. Storage of nonstructural carbohydrates in fall

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  • TAMURA Yoshifumi
    Hokuriku National Agricultural Experiment Station:(Present address)Kyushu National Agricultural Experiment Station

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  • 飼料用麦類における非構造性炭水化物の蓄積と耐雪性 : I.秋季における非構造性炭水化物の蓄積様相
  • 飼料用麦類における非構造性炭水化物の蓄積と耐雪性-1-秋季における非構造性炭水化物の蓄積様相
  • シリョウヨウ ムギルイ ニ オケル ヒ コウ ゾウセイ タンスイカブツ ノ チ

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Description

To clarify the snow endurance in winter annual forage crops through reserve carbohydrate metabolism, storage of nonstructural carbohydrates (NSC) was measured in barley, rye and oats at weekly intervals during fall in the present experiment. Ninety percent ethanol was used to extract mono- and oligosaccharide while fructosans were extracted with 70% ethanol and water. Concentrations of NSC (NSC%), especially of fructosans gradually increased throughout the fall growing season, untill the beginning of snow cover. Regarding with plant parts NSC% was higher in the stems than in the leaf blades and roots. Among the three species, storage of NSC and degrees of polymerization of fructosan were supposed to be superior in the order of rye>barley>oats. Changes in the concentrations of NSC bore a close resemblance to that in the dry matter contents (%). It is considered that NSC as a component of dry matter directly affected the fluctuation of dry matter content.

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