Effects of γ-PGA Application on Growth,

BAO Congcong; XIAO Yuansong; PENG Futian

doi:10.13870/j.cnki.stbcxb.2020.03.031

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Effects of γ-PGA Application on Growth,

更新时间：2025-03-12

- Effects of γ-PGA Application on Growth,
- Vol. 34, Issue 3, Pages: 207-211(2020)
- 作者机构：
  
  山东农业大学园艺科学与工程学院, 作物生物学国家重点实验室,山东,泰安,271018
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.03.031
  CLC： S662.1
- Published：2020
- 稿件说明：
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BAO Congcong, XIAO Yuansong, PENG Futian. Effects of γ-PGA Application on Growth,[J]. 2020, 34(3): 207-211.
DOI：

BAO Congcong, XIAO Yuansong, PENG Futian. Effects of γ-PGA Application on Growth,[J]. 2020, 34(3): 207-211. DOI： 10.13870/j.cnki.stbcxb.2020.03.031.

摘要

以1年生桃树盆栽实生苗为试材，底肥为尿素3 g（其中15N标记0.4 g）、磷酸二氢钾3 g，设CK为对照，T1、T2、T3分别添加γ-PGA 10，80，150 mg，探究不同浓度γ-聚谷氨酸（γ-PGA）对桃树植株生长与氮素吸收利用的影响。结果表明：施用中量和高量γ-PGA能显著提高土壤脲酶与过氧化氢酶活性以及土壤碱解氮含量；施用中、高量γ-PGA能促进桃实生苗根系生长，尤其是细根的生长。与对照相比，施用中量γ-PGA桃实生苗根系总长度、分支数、根尖数、交叉数和根系总表面积分别增加51.95%，40.53%，30.72%，35.21%，45.23%；施用中、高量γ-PGA能显著提高植株净光合速率和叶绿素SPAD值，以及干物质积累量。施用中、高量γ-PGA 能显著提高桃实生苗根系活力、硝酸还原酶、谷草转氨酶和谷丙转氨酶活性。施用中、高量γ-PGA提高了桃实生苗氮素吸收利用率和氮素残留率，降低了氮素损失率，与对照相比，氮素吸收利用率分别提高27.80%和27.07%，氮素残留率分别提高14.00%和19.04%，氮素损失率分别降低16.43%和19.49%，且差异显著。可见施用γ-PGA可改善桃根区土壤理化性状，提高植株氮素吸收利用率和土壤氮素残留率，降低氮素损失率，促进了桃实生苗的生长。

Abstract

One-year-old peach potted seedlings were used as test materials. The base fertilizer was urea 3 g (of which 15N was labeled 0.4 g) and potassium dihydrogen phosphate 3 g. The CK was set as control. The treatment T1

and T3 were added with 10

80 and 150 mg γ-polyglutamic acid (γ-PGA) to investigate the effects of different concentrations of γ-PGA on peach seedlings growth and nitrogen uptake and utilization. The results showed that the activity of soil urease and catalase as well as the content of soil alkali-hydrolyzed nitrogen could be significantly increased by applying medium and high levels of γ-PGA. Application of medium and high amount of γ-PGA could promote root growth of peach seedlings

especially the growth of fine roots. Compared with the control group

the total root length

the number of branches

the number of root tips

the number of crossings

and the total root surface area increased by 51.95%

40.53%

30.72%

35.21% and 45.23%

respectively. The net photosynthetic rate

the chlorophyll SPAD value

and the dry matter accumulation of plants could be significantly increased by applying medium and high γ-PGA. The activity of root system

the nitrate reductase

the rice straw transaminase

and the rice third transaminase were significantly increased by applying medium and high γ-PGA. Compared with the control group

the nitrogen uptake efficiency and nitrogen residual rate were increased by 27.80% and 27.07%

the nitrogen residual rate was increased by 14.00% and 19.04%

and the nitrogen loss rate was decreased by 16.43% and 19.49%

respectively. It can be seen that applying γ-PGA can improve soil physical and chemical properties in peach root area

improve nitrogen uptake efficiency and soil nitrogen residual rate

reduce nitrogen loss rate

and promote the growth of peach seedlings.

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Keywords

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