论文部分内容阅读
近年我们用P~(32)、S~(35)、C_1~(45)等同位素进行了苹果、梨幼树养分运转规律的研究,兹将所得结果简述如下: (一)根系生长活动最旺的时期,吸肥力量最强 不同根龄,吸收强度不问,以白色吸收根最强,木栓化根次之,二年生以上老根最弱,其近似比值为16:2:1。在武汉地区不予深耕的条件下,正当苹果新根发生最多的5月前后,共吸肥量最
In recent years, we used the P ~ (32), S ~ (35), C_1 ~ (45) and other isotopes of apples and pears young tree nutrient operation rules, the results will be summarized as follows: Wang period, the highest absorption strength of different root age, absorption intensity does not ask, with white absorption of the strongest root, followed by cork suppository, perennial roots above the weakest, the approximate ratio of 16: 2: 1. Under the condition of no deep plowing in Wuhan area, just before May when the new root of apple occurred,