| Effects of organic fertilization within partial root on the growth and leaf physiological characteristics of apple trees |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2016.03.04 |
| Key Words: apple tree partial organic fertilizer growth leaf physiological characteristics |
| Author Name | Affiliation | | LI Cui-hong | Agricultural Product Storage and Processing Research Institute, Lanzhou Gansu 730070, China | | ZHANG Qiang | Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China | | FENG Yu-qin | Agricultural Product Storage and Processing Research Institute, Lanzhou Gansu 730070, China | | CHEN Da-peng | Agricultural Product Storage and Processing Research Institute, Lanzhou Gansu 730070, China | | ZHANG Yong-mao | Agricultural Product Storage and Processing Research Institute, Lanzhou Gansu 730070, China | | WEI Qin-ping | Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China |
|
| Hits: 1071 |
| Download times: 724 |
| Abstract: |
| To confirm the usage amount and application area of organic fertilizer, the effects of fertilization at 1/4, 2/4 and 3/4 partial root zones were investigated on the growth of new shoots, root growth dynamics, chlorophyll and net photosynthetic rate (Pn) and transpiration rate (Tr) and stomatal conductance (Gs). The experimental material were three-year old roots of potted Red General trees (Malus domestica cv.), and rootstock were Malus hupenensis Rehd. This study may provide theoretical basis and technological support for the improvement of organic fertilization methods and consumption in apple orchard. The length of new shoots at 1/4 partial root zone with 30% application of organic fertilizer was 14.2 cm, reaching the longest. When applied at 2/4 partial root zone with 20% application organic fertilizer, the biomass of root was the biggest, and root length was 230.0 mm throughout the growing season. Meanwhile, the chlorophyll concentration at 2/4 partial zone was significant higher than that at 1/4 and 3/4 zones. Diurnal changes and seasonal changes of net photosynthetic rate (Pn) and stomatal conductance (Gs), which were investigated under the treatments at 1/4 partial root zone with 30%, 2/4 partial root zone with 20%, and 3/4 partial root zone with 10% application organic fertilizer, were obviously higher than those by other treatments. However, the transpiration rate (Tr) did not show significant change by all treatments. Applications at 1/4, 2/4 and 3/4 partial root zones with 30%, 20% and 10% organic fertilizer, respectively, can maintain the natural growth rate of apple trees through saving the consumption of organic fertilizer, and preserving soil moisture and fertility. |
|
|
|