|
| Comparison of Physiological and Ecological Characteristics Between Borreria latifolia and Several Common Orchard Weeds |
| |
| DOI：10.16768/j.issn.1004-874X.2020.06.010 |
|
| Hits: 1794 |
| Download times: 824 |
| Abstract: |
| 【Objective】Borreria latifolia is suitable for green covering in the orchards of south China. The study is conducted to elucidate the physiological and ecological characteristics of B. latifolia and several common orchard weeds.【Method】The differences in seed morphology and germination characteristics, root characteristics, photosynthetic characteristics, and sensitivity to glyphosate between B. latifolia and three common weeds, Ageratum conyzoides, Bidens alba and Eleusine indica, were compared.【Result】The thousand seed weight of B. latifolia was 1.8-25.8 times than that of A. conyzoides, B. alba and E. indica. Meanwhile, seed germination rate of B. latifolia was greater than that of other weeds, and seedling growth of B. latifolia was also faster. The root-shoot ratio of B. latifolia was 70.1%-79.3% lower than that of other weeds. However, the diameter frequency（87.8%） of its root system in the range of 0-0.5 mm was 16.3%-21.6% higher than that of the other three weeds. Among the four species, B. latifolia had the lowest photosynthetic intensity, and its net photosynthetic rate（Pn） was 22.9%, 34.3%, and 64.3% lower than that of A. conyzoides, B. alba and E. indica, respectively, while its transpiration rate（Tr） and stomatal conductance（gs） were lower than those of A. conyzoides and B. alba, but higher than those of E. indica. B. latifolia was less sensitive to glyphosate than A. conyzoides and B. alba, and the 50% effective dose（ED50） of glyphosate on B. latifolia was 3.74 and 1.79 times of A. conyzoides and B. alba, respectively.【Conclusion】The characteristics of B. latifolia are fast growth ability at the seedling stage, shallow roots, low photosynthetic rates and glyphosate tolerance. |
|
View Full Text
View/Add Comment Download reader |
|
|
|
