At the initialstage of retapping after winter rest, DRC and magnesium content decreased while rubber yield,sucrose content, total acid phosphatase activity and PI increased gradually.

• PR107经过冬季休割后重新割胶初期，胶乳干胶含量、镁含量下降，而干胶产量、胶乳蔗糖含量、总酸性磷酸酶活性及堵塞指数逐渐上升。