摘要
研究观测了不同疏密类型的低产劣质柑桔树冠内膛腹接国庆１号良种枝组处光合有效辐射、气温、空气相对湿度等微生态指标；检测了叶片光合能力和营养水平；调查了腹接枝组的增产效应及其果品质量。结果表明，内膛腹接枝组的营养水平较高，气温和空气相对湿度适宜，因而有利于光合生产和生长发育及开花结果。光照条件则因树冠累积叶面积系数不同而异。低产劣质柑桔树内膛腹接良种是一项行之有效的增产优质新技术。生产中直对树冠累积叶面积系数４．５左右、内膛明显空秃的成龄柑桔树腹接良种，同时加强土、肥、水管理和整枝修剪等措施，控制植株累积叶面积系数６．０—６．５，促使内膛腹接良种迅速发育成新型结果枝组，实现持续增产优质和逐步更新树冠。
Several microecologic indexes such as photosynthetically active radiation, air temperature and relative air humidity at interior-side-grafting branches(ISGB) of the superior citrus cultivar Guoping No.1 were observed in different density types of citrus trees of low fruit yield and poor quality.Their leaf photosynthetic capacity and nutritional level were determined. The effects on the improvement of fruit yield and quality of the ISGB were also investigated. The results showed that the ISGB had a high level of nutrition,and the air temperatures and relative air humidity around them were rather favourable to photosynthetic production, growth,development, flowering and fruit-bearing, while the sunlight condition varied with the cumulative leaf area index(CLAI). It has been proved that ISGB of superior cultivars is a new effective measure which can be applied when the CLAI of a citrus bearing tree canopy decreases to 4.5, with obvious bare spaces in the canopy. Furthermore,more attention should be paid to training and pruning the tree canopy to regulate its CLAI to about 6.0-6. 5. Some proper management measures of siol, fertilizers and water should be adopted at the same time to ensure the quick development of ISGB into new and compact bearing branches. Thus, sustained high yielding of citrus fruit with superior quality and the renewing of old inferior citrus tree canopies year after year can be achieved.
出处
《江苏农业学报》
CSCD
1994年第4期17-23,共7页
Jiangsu Journal of Agricultural Sciences
