DRC,rubber yield and total acid phosphatase activity decreased obviously in winter, whereas R-SHand Pi increased sharply with other parametrs being at d low value.

• 到冬季胶乳干含、产胶量及总酸性磷酸酶活性明显下降，而胶乳硫酸和无机磷含量显著上升，其它生理参数保持在较低值。