【摘要】 笔者针对天然沙棘林生长密集、结实量小的特点,开展了疏伐对其生长、结实影响的研究。结果表明:疏伐后,沙棘当年新生枝数量增加近50%,1年至3年内侧枝生长最快,第2年生长量最大,第3年树冠长度增加1倍以上,树冠投影面积增加近1倍;伐后第2年新生侧枝开始结实,第3年至4年结实量大幅增加;疏伐后沙棘株行距保持为1.0 m×3.0 m或1.5 m×3.0 m较好。冬春季风力较大的地段,宜采用带状疏伐,伐后密度不宜过小,带内株行距保持在1.0 m×2.0 m或1.5 m×3.0 m,每带3行~4行为宜。更多还原

【Abstract】 The characteristics of natural Hippophae rhamnoides forest are dense growth and less fruit. Effect of thinning on its growth and fruit was studied according to these characteristics. Results showed that the increase of new branches of Hippophae rhamnoides in the year was about 50% after thinning. The growth of lateral branch was the fastest from the first year to the third year and the maximum growth was reached in the second year. Crown length increased by more than 1 times and projected area increased by nearly 1 times in the third year. The new lateral branches began to bear fruit in the second year after thinning and the fruit capacity increased significantly from the third year to the fourth year. Row and plant spacing of1. 0 m × 3. 0 m or 1. 5 m × 3. 0 m were better after thinning. Strip thinning could be adopted at the location with large wind force in winter and spring. Density should not be too small after thinning. There were 3 lines ~ 4 lines in a belt,row and plant spacing was 1. 0 m × 2. 0 m or 1. 5 m × 3. 0 m.更多还原