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[Objective] Aiming at the problem of low sugar content in early-ripening citrus fruits in Yunnan province, we studied the effect of number of leaves on bearing branch on fruit hypertrophy and quality of early maturing citrus. [Method] Five early maturing citrus varieties’ Okitus wase’with the same age and similar growth were selected as the test materials, according to the number of different leaves on the bearing branch, we measured transverse diameter, vertical diameter and stalk coarseness of the fruit, determined the contents of soluble sugar (glucose, sucrose, fructose) , soluble solids and titratable acid. [Result] The results showed that the difference of the number of leaves on bearing branch had a significant effect on the fruit stalk coarseness and fruit hypertrophy.From late May to late September, the fruit transverse diameter, vertical diameter of 7 leaves on the bearing branch was significantly higher than that of bearing branch with 1 or 4 leaves;and from mid-May to late September, the fruit stalk coarseness of bearing branch with 7 leaves was significantly higher than that of bearing branch with 1 leaf;the glucose, fructose, single weight, peel weight and titratable acid content of the fruit with 7 leaves on bearing branch were significantly higher than the fruit with 1 leaf;the b value of fruit with 4 leaves on bearing branch was significantly higher than that with7 leaves. [Conclusion] Early maturing citrus’ Okitus wase’with the 7 leaves on bearing branch had a significant effect on fruit hypertrophy and quality.In the process of practical production management, We could stimulate the bearing branch with many leaves, select the best ratio of leaf to fruit, reduce the leafless and less leafless bearing branch, and improve the cultivation management technique and the quality of early maturing citrus’ Okitus wase’in Yunnan Province. [ABSTRACT FROM AUTHOR]

[Objective] The effects of soil water content and light intensity on the leaf flexibility of flue-cured tobacco leaves under different leaf number were studied. [Method] Through the greenhouse experiment set,the number of leaves (18, 20, 22) ,different soil moisture content (more 40 % or less 20 %) , and different light intensity (shading, no shading) ,the leaf flexibility of all parts of flue-cured tobacco K326 was studied. [Result] In tin; ease of a certain number of leaves, the lower tin; soil water content was, the less the light was, tin; shorter tin; growth period of flue-cured tobacco was, tin; worse tin; growth the lower the flexibility of tin; flue-cured tobacco leaves was,and tin; more prone to the phenomenon of broken leaves was. [Conclusion] When the flue-cured tobacco was in the environmental condition with the phenomenon of broken leaves, it was necessary to reduce the effective leaf number to improve the flexibility of the leaves to a certain extent so as to achieve the purpose of preventing tin; occurrence of broken leaves. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agricultural Science & Technology (1008-0864) is the property of Journal of Agricultural Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To find out the appropriate number and harvest maturity of tobacco leaves for cigar variety (GH1) in Shifang area, the effects of the number of leaves and harvest maturity on the chemical composition and the quality of tobacco leaf were analyzed; The amount of total nitrogen and nicotine in cigar tobacco leaves were significantly influenced by the number of tobacco leaves, while the contents of ash and potassium in tobacco leaves were not significantly affected; Both of the number and harvest maturity affected sensory quality of cigar tobacco leaves significantly, and harvest maturity was the more powerful one; The optimal number of leaves for cigar variety (GH1) was 16. When the upper leaves were at stage of under-ripe or delayed in 3 days, they were suitable for harvest, while the harvest of lower part leaves should be 6 days later than the stage of under-ripe. [ABSTRACT FROM AUTHOR]

Effects of grades of cutting, substrates, leaf number and hormone concentration on cutting propagation of Crassula arborescens were researched. Results showed that the survival rate and rooting rate and germination rate of wood cutting were the highest with 97.75%, 75.16 % and 90.38% respectively and the second was softwood; The rooting rate of the leaf cutting with the substrate of vermiculite increased significantly and the second was vermiculite∶ sand = 1∶ 1; the cutting of softwood with two leaves was the best with 96.48% survival rate, 70. 07 % rooting rate, 89. 30 % germination rate and 2. 53 average number of roots per plant and the second was one leaf; Rooting quality was the best with NAA 10 mg/L treated leaf, its survival rate and rooting rate reached 97. 67 % and 76.67% separately. [ABSTRACT FROM AUTHOR]

To analyze the tradeoff relationship between twigs and leaves, the traits of Pinus hwang-shanensis including leaf area, leaf number, twig length and twig diameter were investigated in Wuyi Mountains along an altitudinal gradient. The results indicated that leaf number, twig length, twig diameter, leafing intensity and twig stem cross-sectional area of P. hwangshanensis increased gra-dually with the increasing altitude, while individual leaf area decreased gradually. Leafing intensity of P. hwangshanensis at different altitudes had significant negative relationships with leaf area. The cross-sectional area of P. hwangshanensis had significant positive relationship with total leaf area. Twig length and twig diameter of P. hwangshanensis correlated negatively with leafing intensity, but positively with leaf area, leaf number and total leaf area. To enhance the competitiveness and resource utilization efficiency, P. hwangshanensis at low altitude tended to have relatively few large leaves on short twigs, and those at high altitude tended to have a large number of small leaves on long twigs. Such tradeoff between twigs and leaves reflected the strategy of resource utilization and the balance of biomass allocation mechanism of P. hwangshanensis responding to the altitudinal change.