选6年生先锋葡萄8株,从果实软化期到成熟期,每隔1周从固定的30个果穗中取1粒测定果汁糖度和果色(比色卡值),在新梢停止生长之日测定果穗着生在新梢上的全部叶的叶宽,用预先编成公式来推断叶面积。 结果表明①果粒软化日的精度都在7.8°左右,糖度的偏差小;②软化后两周内糖度上? Select 6-year-old vanguard of grape 8, from the fruit softening period to maturity, every 1 week from the fixed 30 ears to take a determination of fruit juice sugar and fruit color (color card value), in the shoot to stop the growth of the day The ear width of all the leaves on the ear shoots was measured, and the leaf area was deduced from the pre-programmed formula. The results showed that ① the accuracy of fruit softening day are about 7.8 °, the deviation of the degree of sugar is small; ② within two weeks after softening sugar?