Effect of organic fertilizer combined with water-retaining agents on soil hydraulic characteristics in topsoil layer of brown soil

Zhao Min; Wang Xinping; Zhao Cong; Huang Xuefang

doi:10.13961/j.cnki.stbctb.2025.01.003

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Effect of organic fertilizer combined with water-retaining agents on soil hydraulic characteristics in topsoil layer of brown soil

- Effect of organic fertilizer combined with water-retaining agents on soil hydraulic characteristics in topsoil layer of brown soil
- Bulletin of Soiland Water Conservation Vol. 45, Issue 1, Pages: 20-29(2025)
- 作者机构：
  
  1. 山西农业大学山西有机旱作农业研究院/农业农村部有机旱作农业重点实验室,山西,太原,030031
  2. 山西农业大学资源环境学院, 山西太谷,030801
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.01.003
  CLC： S152.7;S156.92
- Published：2025
- 稿件说明：
移动端阅览
Zhao Min, Wang Xinping, Zhao Cong, et al. Effect of organic fertilizer combined with water-retaining agents on soil hydraulic characteristics in topsoil layer of brown soil[J]. Bulletin of Soiland Water Conservation, 2025, 45(1): 20-29.
DOI：

Zhao Min, Wang Xinping, Zhao Cong, et al. Effect of organic fertilizer combined with water-retaining agents on soil hydraulic characteristics in topsoil layer of brown soil[J]. Bulletin of Soiland Water Conservation, 2025, 45(1): 20-29. DOI： 10.13961/j.cnki.stbctb.2025.01.003.

摘要

[目的

]

研究有机肥配施保水剂对褐土耕层土壤水力特性的改良效果，旨在探寻最适配施的有机肥施入量及保水剂最佳配施比例，为褐土高水效耕层构建提供技术途径和理论依据。[方法

]

以山西省褐土耕层土壤为研究对象，采用裂区试验设计。以有机肥施用量为主区，设置F

(0 t/hm

)，F

(45 t/hm

)，F

(60 t/hm

)和F

(75 t/hm

)4个处理；以保水剂施用量为副区，设置B

(0 kg/hm

)，B

(300 kg/hm

)，B

(600 kg/hm

)和B

(900 kg/hm

)4个处理，探究有机肥和保水剂施用量对褐土耕层土壤水分特征曲线、比水容量值和有效水含量等水力特性的影响。[结果

]

①与单施保水剂相比，有机肥配施保水剂处理土壤持水能力和供水能力均增强，有效含水量增加。②有机肥施入量不同，有机肥配施保水剂对土壤水力特性的改良效果不同。试验土壤低吸力段持水能力，供水能力及有效水含量均表现为：F

＞F

。③F

处理下，随着保水剂配施比例的增加，土壤的持水能力与供水能力呈现先增加后降低的趋势；土壤有效水含量与保水剂配施比例呈抛物线关系(R

=0.949 3)。[结论

]

中量有机肥(60 t/hm

)配施保水剂对褐土耕层土壤改良效果最好，此有机肥投入量下保水剂的最佳配施比例是0.91%。

Abstract

[Objective] The effect of combining organic fertilizer with a water retaining agent on the hydraulic properties of brown soil in the tillage layer was analyzed in order to provide a technical approach and theoretical basis that can be used to improve brown soil tillage by finding the optimal organic fertilizer application amount and the optimal water retaining agent ratio. [Methods] A brown soil topsoil from Shanxi Province and a split-plot experimental design were used for the experiment. The main plot treatments were the amount of organic fertilizer applied: F1 (0 t/hm2)

F2 (45 t/hm2)

F3 (60 t/hm2)

and F4 (75 t/hm2)

and the subplot treatments were four water-retaining agent applications: B1 (0 kg/hm2)

B2 (300 kg/hm2)

B3 (600 kg/hm2)

and B4 (900 kg/hm2). The effects of the amount of organic fertilizer and water-retaining agent on the soil water characteristics curve

specific water capacity

and available water content were analyzed. [Results] ① Soil water-holding capacity

water-supply capacity

and the effective water content increased in the organic fertilizer combined with water-retaining agent treatments compared to the water-retaining agent alone treatments. ② The effects of organic fertilizer combined with a water-retaining agent on soil hydraulic properties varied depending on the amounts of organic fertilizer applied. The water-holding capacity and water-supplying capacity of the test soil at low suction section followed the order F3 > F2 > F4 > F1

and the same was true for the effective water content. ③ Under the F3 treatment

the water holding capacity and water supply capacity of the soil first increased and then decreased as the water retaining agent application rate increased. There was a parabolic relationship between the effective soil water content and water-retaining agent application ratio (R2=0.949 3). [Conclusion] The improvement effect was greatest under the treatments with a medium amount of organic fertilizer (60 t/hm2) combined with a water-retaining agent and the optimum proportion of water-retaining agent under this amount of organic fertilizer was 0.91%.

关键词

Keywords

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