With the drying time of forage rye being extended, the CP content was decreasing, NDF and ADF content were increasing, causing the nutritional value decreased.

随着青刈黑麦干燥时间延后，其粗蛋白质含量不断降低，NDF、ADF含量不断增加，导致青刈黑麦营养价值下降。

youdao

Mr Watts said milk production had been more expensive during the winter because the nutritional value of forage had been undermined by a lack of sunshine.

BBC: Channel Islands' wet weather 'demoralising for farmers'