Morphology and Physiology of Walnut Stock Seedlings as Affected by Nitrogen Fertilizations

SONG Yan; ZHANG Rui; YU Shang-qi; LIU Chun-hua; GAO Shan; WANG Yu; LUO Li-xin; ZHANG Jian-liang

doi:10.19303/j.issn.1008-0384.2020.03.010

Volume 35 Issue 3

Mar. 2020

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Article Navigation > Fujian Journal of Agricultural Sciences > 2020 > 35(3): 309-316

SONG Y, ZHANG R, YU S Q, et al. Morphology and Physiology of Walnut Stock Seedlings as Affected by Nitrogen Fertilizations [J]. Fujian Journal of Agricultural Sciences，2020，35（3）：309−316 doi: 10.19303/j.issn.1008-0384.2020.03.010

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SONG Y, ZHANG R, YU S Q, et al. Morphology and Physiology of Walnut Stock Seedlings as Affected by Nitrogen Fertilizations [J]. Fujian Journal of Agricultural Sciences，2020，35（3）：309−316 doi: 10.19303/j.issn.1008-0384.2020.03.010

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Morphology and Physiology of Walnut Stock Seedlings as Affected by Nitrogen Fertilizations

doi: 10.19303/j.issn.1008-0384.2020.03.010

SONG Yan^{1, 2, 3
,},
ZHANG Rui^{1, 2, 3
,
,},
YU Shang-qi^{1, 4},
LIU Chun-hua^{1, 2, 3},
GAO Shan²,
WANG Yu^{2, 3},
LUO Li-xin⁵,
ZHANG Jian-liang⁵

1.
Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basi¹, Xinjiang Production and Construction Corps, Alar, Xinjiang　843300, China
2.
College of Plant Science and Technology, Tarim University, Alar, Xinjiang　843300, China
3.
National and Local Joint Engineering Laboratory of High Efficiency and Superior-Quality Cultivation and Fruit Deep Processing Technology of Characteristic Fruit Trees in South, Alar, Xinjiang　843300, China
4.
College of Life Science, Tarim University, Alar, Xinjiang　843300, China
5.
First Division of the Third Group Forestry Station, Xinjiang Production and Construction Corps, Alar, Xinjiang　843300, China

Received Date: 2019-11-24
Rev Recd Date: 2020-01-05
Publish Date: 2020-03-01

Abstract

Abstract

Objective Varied N levels for fertilization were applied to determine the effects on the morphological and physiological characteristics of the Juglans regia L. rootstock seedlings from two provenances in Xinjiang. Methods Juglans regia L. rootstock seedlings from provenances at Aksu and Hotan were treated with varied levels of N fertilizer, and the morphology, biomass, photosynthetic characteristics, and soluble sugar content in leaves of the seedlings determined. Results The various evaluation indicators tended to increase initially and followed by a decline upon increasing N but responded differently between the seedling specimens from the two localities. Under 10−15 g·a⁻¹·plant⁻¹ application rates, the plant height peaked at 95.27 cm and 72.07 cm, while the total root volume at 1 249.75 cm³ and 928.01 cm³, respectively, for the Juglans regia L. plants from the two sources. The net photosynthetic rates for them increased with N to arrive at a maximum of 12.725 1 μmol·m⁻²·s⁻¹ and 12.357 3 μmol·m⁻²·s⁻¹, respectively, under the 10 g·a⁻¹·plant⁻¹ fertilization. Further increases on N caused a gradual decline on the net photosynthetic rate. According to the comprehensive evaluation, the morphological characteristics and physiological characteristics of Juglans regia L. rootstock seedlings in the two provenances with nitrogen application at 10−15 g·a⁻¹·plant⁻¹ showed the optimal characters. Conclusion Over all, the Juglans regia L. rootstock seedlings from the two provenances performed well morphologically and physiologically under the applications of 10−15 g·a⁻¹·plant⁻¹. In that range, Aksu walnut exhibited a greater N utilization ability than its counterpart.
- nitrogen level,
- rootstock seedling,
- provenance,
- morphology,
- photosynthesis

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References(31)

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