Effects of Drip Irrigation and Spray Irrigation Fertilization on Spatial Differentiation of Soil Nutrients and Root Growth of Tea Seedlings

LIU Zijun; YE Yun; WANG Li; ZHANG Yao; QI Yongbo; MU Jing; ZHANG Ligan

doi:10.13870/j.cnki.stbcxb.2022.06.040

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Effects of Drip Irrigation and Spray Irrigation Fertilization on Spatial Differentiation of Soil Nutrients and Root Growth of Tea Seedlings

更新时间：2025-03-12

- Effects of Drip Irrigation and Spray Irrigation Fertilization on Spatial Differentiation of Soil Nutrients and Root Growth of Tea Seedlings
- Vol. 36, Issue 6, Pages: 330-339(2022)
- 作者机构：
  
  农田生态保育与污染防控安徽省重点实验室, 安徽农业大学资源与环境学院,合肥,230036
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.06.040
  CLC： S157.4
- Published：2022
- 稿件说明：
移动端阅览
LIU Zijun, YE Yun, WANG Li, et al. Effects of Drip Irrigation and Spray Irrigation Fertilization on Spatial Differentiation of Soil Nutrients and Root Growth of Tea Seedlings[J]. 2022, 36(6): 330-339.
DOI：

LIU Zijun, YE Yun, WANG Li, et al. Effects of Drip Irrigation and Spray Irrigation Fertilization on Spatial Differentiation of Soil Nutrients and Root Growth of Tea Seedlings[J]. 2022, 36(6): 330-339. DOI： 10.13870/j.cnki.stbcxb.2022.06.040.

摘要

探究滴灌和喷灌对土壤理化和生物学性状及茶苗根系生长的影响

为科学灌溉施肥提供理论依据。土壤培养设置土施(SA)、喷施(FA)和滴施(DA)3种施肥方式

60天后

选取培养钵表土中心点为参照

根据距中心点水平和垂直方向距离差异

将培养土壤划分3个空间区域

观测pH、电导率、养分和生物学性质;茶树盆栽试验设置2个氮水平和土施、喷施、滴施3种施肥方式共6个处理

观测茶苗根系生长和形态。土培试验结果表明

FA与SA处理不同空间土壤区域无明显差异

而DA与FA之间差异明显

60天后离中心点水平5 cm、垂直0—10 cm的土壤区域内

其电导率、pH、碱解N、速效K和速效P含量DA较FA分别增加35.6%

30.7%

40.6%

34.3%和74.8%

区域内细菌、真菌和放线菌分别增加174.6%

167.0%和289.0%

脲酶和酸性磷酸酶活性呈相反变化

DA较FA分别降低42.5%和31.4%。盆栽试验结果表明

茶树根系生长整体表现为FA＞SA＞DA

FA较DA的茶苗根鲜重、根总长、根体积、根尖数、分支数和交叉数均明显提高

不同N水平之间的促根效应差异不明显。综上

施肥方式对土壤养分空间分布、土壤生物学特性及茶苗根系生长影响明显。DA滴头中心点微域土壤的电导率、养分含量和微生物数量较SA和FA增加显著

存在明显的微域集聚效应

而脲酶、酸性磷酸酶活性降低。DA施肥方式明显抑制茶苗根系生长

而FA则显著促进茶苗根系生长和形态建成。

Abstract

This research investigated the effects of drip and spray irrigation on the physical

chemical and biological properties of the soil and root growth of tea seedlings

and could provide a theoretical basis for scientific irrigation and fertilization. Three types of fertilizer application were set up

soil application (SA)

spray application (FA) and drip application (DA). After 15

45 and 60 days

the soil was divided into three spatial zones according to the difference in horizontal and vertical distance from the center of the topsoil of the culture bowl

and pH

conductivity

nutrients and biological properties were observed. In the pot experiment of tea seedlings

six treatments were set up

including two nitrogen levels and three fertilization methods of soil application

spraying and dropping. The root growth and morphology of tea seedlings were observed. The results of the soil culture showed that there was no significant difference between FA and SA treatments in different spatial soil regions

while there were significant differences between DA and FA. After 60 days

in the soil region 5 cm horizontally and 0—10 cm vertically from the center point

compared with FA

the conductivity

content of alkali-hydrolyzed N

available K and available P of DA increased by 35.6%

30.7%

40.6%

34.3% and 74.8%

respectively

and bacterial

fungal and actinomycetes in the region of DA increased by 174.6%

167.0% and 289.0%

respectively. The activities of urease and acid phosphatase in the soil region of DA showed opposite trend

decreased by 42.5% and 31.4%

respectively

compared with FA. The results of pot experiment showed that the overall root growth of tea trees followed the order of FA＞SA＞DA

and the root fresh weight

total root length

root volume

root tip number

branch number and cross number of tea seedlings in the FA treatment were significantly higher than those of DA

while there was no significant difference in the root promoting effect among different N levels. In summary

fertilization methods had significant effects on the spatial distribution of soil nutrients

soil biological properties and root growth of tea seedlings. Compared with SA and FA

the conductivity

nutrient content and microbial population in the micro domain at the center of the DA drip head increased significantly

and there was a significant micro domain aggregation effect

while the urease and acid phosphatase activities decreased. DA significantly inhibited the root growth of tea seedlings

while FA significantly promoted the root growth and morphological establishment of tea seedlings.

关键词

Keywords

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