Pedosphere 9(4): 363--368, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of boron fertilizer on flower and fruit drop of prunes |
| YANG Xiao-Ling1 and BAO Shi-Dan2 |
1 Tianjin Academy of Agricuturla Sciences, Tianjin 300192 (China);
2 Department of Natural Resources and Environmental Sciences, Nanjing Agricutural Univereity, Nanjing 210095 (China) |
| ABSTRACT |
| Effect of boron on falling of prunes (Prunus mume, Sieb, et Zucc) was studied by applying 50 g borate per tree into soil on December 15, 1993 (soil-B) and spraying leaves leves evenly twice with 1.5 g kg-1 borate solution on March 1 and 8, 1994 (spray-B) on the soil with 0.28 mg kg-1 rapidly available B. Compared with no borate treatment (CK), B concentrations of leaves, short branches and flowers were higher and the percentage of flower and fruit drop was lower in the treatments of soil-B and spray-B. B fertilizer increased B concentrations in flowers, leaves and short branches, promoted pollen germination, reduced the percentage of fall of flowers and fruits of prunes, increased the percentage of fertile fruits, and thus increased yields of prunes by 46% and 34.3% in the treatments of soil-B and spray-B, respectively. It could be inferred preliminarily that if B concentration of leaves was lower than 35 mg kg-1, the prunes should be fertilized with B. The measured leaves should be picked from branches (3~10 cm in length) germinating from the central section of a tree crown during the last ten days of May to the early days of June. |
| Key Words: boron, flowers, fruits, prunes |
| Citation: Yang, X. L. and Bao, S. D. 1999. Effect of boron fertilizer on flower and fruit drop of prunes. Pedosphere. 9(4): 363-368. |
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