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以2年生‘红灯’(Prunus avium L.‘Hongdeng’)/东北山樱(Cerasus sachalinensis Kom.)为试材,研究了不同短截程度对13C和15N分配和利用的影响。结果表明,新梢生长期,短截处理修剪促进了碳水化合物向根系分配,极重度短截处理使叶片和新梢中13C分配率分别减少了29.15%和7.3%,粗根和细根中13C分配率增加了46.65%和48.43%。随着时间的推移,短截处理的叶片和新梢的13C分配率均显著高于对照,多年生枝干的13C分配率随短截程度的增加而减小,根系的13C分配率以中短截最低,极重度短截最高。各处理15N利用率从高到底依次为中度短截>对照>极重度短截,在新梢停长期差别最大,3个处理15N利用率分别为6.91%、5.54%和3.60%;多年生枝干15N分配率随短截程度的增加而减小,短截处理叶片和新梢的15N分配率随短截程度的增加而增加。
Prunus avium L. ’Hongdeng’ / Cerasus sachalinensis Kom. Were used as materials to study the effects of different short-cut degrees on the distribution and utilization of 13C and 15N. The results showed that during the shoot growth period, pruning promoted the distribution of carbohydrate to the root system. The extremely short truncation resulted in a 13.15% and 13.3% reduction in the 13C distribution rate in the leaves and shoots, respectively, and 13C in the coarse and fine roots Distribution rates increased by 46.65% and 48.43%. With the passage of time, the 13C distribution rate of leaves and shoots of short cut was significantly higher than that of the control. The 13C distribution rate of perennial branches decreased with the increase of short cut, The lowest, most severe short cut the highest. The 15N utilization rates of all treatments were moderately short> control> very severe short cut, and the difference was greatest in the long shoots of the new shoots. The utilization rates of 15N in the three treatments were 6.91%, 5.54% and 3.60% respectively. The perennial stems The distribution rate of 15N decreased with the increase of the degree of short cut, and the distribution rate of 15N in short-cut leaves and shoots increased with the degree of short cut.