Effects of γ-Polyglutamic Acid on Soil Structure, Nutrient Balance and Spinach Yield

LIU Le; FEI Liangjun; CHEN Lin; FU Yuliang; ZHONG Yun

doi:10.13870/j.cnki.stbcxb.2019.01.043

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Effects of γ-Polyglutamic Acid on Soil Structure, Nutrient Balance and Spinach Yield

更新时间：2025-03-12

- Effects of γ-Polyglutamic Acid on Soil Structure, Nutrient Balance and Spinach Yield
- Vol. 33, Issue 1, Pages: 277-282(2019)
- 作者机构：
  
  1. 西安理工大学水利水电学院,西安,710048
  2. 省部共建西北旱区生态水利工程国家重点实验室,西安,710048
  3. 华北水利水电大学水利学院,郑州,450045
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.01.043
  CLC： S152.4;S156.2;S158.3
- Published：2019
- 稿件说明：
移动端阅览
LIU Le, FEI Liangjun, CHEN Lin, et al. Effects of γ-Polyglutamic Acid on Soil Structure, Nutrient Balance and Spinach Yield[J]. 2019, 33(1): 277-282.
DOI：

LIU Le, FEI Liangjun, CHEN Lin, et al. Effects of γ-Polyglutamic Acid on Soil Structure, Nutrient Balance and Spinach Yield[J]. 2019, 33(1): 277-282. DOI： 10.13870/j.cnki.stbcxb.2019.01.043.

摘要

通过盆栽试验研究了土壤增施γ-PGA（0.1%，0.2%，0.3%，0.4%）对土壤团聚结构、土壤养分平衡、菠菜产量与经济效益的影响。结果表明：随γ-PGA施量增加，水稳性团聚体（WR0.25）、平均重量直径（MWD）和几何平均直径（GMD）均显著增大，而团聚体破坏率（PAD）与分形维数（D）均减小，说明γ-PGA对改善土壤团聚结构具有显著的效果；随γ-PGA施量的增加，菠菜对氮、磷、钾的吸收量减少，土壤养分残留量与盈余量增加，养分表观损失量减小；5组处理中，0.1%施量的土壤养分平衡状况最优，0.4%施量对作物养分吸收与土壤养分的平衡产生负效应；菠菜产量及经济效益均随γ-PGA施量增加而显著减小，0.4%施量时较未施γ-PGA减产42.98%；菠菜经济效益拟合结果表明γ-PGA在0~0.1%施量范围内菠菜获利高于不施加γ-PGA处理。综上，0.1%施量对改善土壤结构与养分状况、促进作物增产及作物养分吸收效果较优，这对进一步将γ-PGA应用于实际生产中提供了理论参考。

Abstract

The effects of γ-PGA (0.1%

0.2%

0.3% and 0.4%) application on soil agglomeration structure

soil nutrient balance

spinach yield and economic benefit were studied by pot experiment. The results showed that with the increasing of γ-PGA application rate

the water-stable aggregates (WR0.25)

the average weight diameter (MWD) and geometric mean diameter (GMD) increased

while the agglomerate destruction rate (PAD) and the fractal dimension (D) decreased

which indicated that γ-PGA had a significant effect on improving soil agglomeration structure. With the increasing of γ-PGA application rate

the absorption of nitrogen

phosphorus and potassium by spinach decreased

while soil nutrient residue and surplus amount increased

and the apparent loss of nutrients decreased. Among the five treatments

the soil nutrient balance condition of the 0.1% application treatment was the best

while the 0.4% application rate had a negative effect on crop nutrient absorption and soil nutrient balance. Spinach yield and economic benefit decreased significantly with the increasing of γ-PGA application rate

and the yield in 0.4% application treatment decreased by 42.98% compared with the control (field without adding γ-PGA). The fitting results of the spinach economic benefits showed that the profit of the treatment applicated 0~0.1% γ-PGA was higher than that of the treatment without γ-PGA. In summary

the 0.1% application rate was better for improving soil structure and nutrient balance

promoting crop yield and crop nutrient absorption

which provided a theoretical reference for the further application of γ-PGA in actual production.

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