Mixed Irrigation of Brackish Water and Reclaimed Water Affects Crop Physiological Characteristics

LIU Chuncheng; CUI Bingjian; HU Chao; WU Haiqing; MA Huanhuan; CUI Erping; MA Tian; LIU Yuan; LI Zhongyang; FAN Xiangyang; LI Hao; GAO Feng

doi:10.13870/j.cnki.stbcxb.2021.04.045

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Mixed Irrigation of Brackish Water and Reclaimed Water Affects Crop Physiological Characteristics

更新时间：2025-03-12

- Mixed Irrigation of Brackish Water and Reclaimed Water Affects Crop Physiological Characteristics
- Vol. 35, Issue 4, Pages: 327-333(2021)
- 作者机构：
  
  1. 中国农业科学院农田灌溉研究所,河南,新乡,453002
  2. 中国农业科学院研究生院,北京,100081
  3. 中国农业科学院河南新乡农业水土环境野外科学观测试验站, 农业水资源高效安全利用重点开放实验室,河南,新乡,453000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.04.045
  CLC： S154.3;S155.4
- Published：2021
- 稿件说明：
移动端阅览
LIU Chuncheng, CUI Bingjian, HU Chao, et al. Mixed Irrigation of Brackish Water and Reclaimed Water Affects Crop Physiological Characteristics[J]. 2021, 35(4): 327-333.
DOI：

LIU Chuncheng, CUI Bingjian, HU Chao, et al. Mixed Irrigation of Brackish Water and Reclaimed Water Affects Crop Physiological Characteristics[J]. 2021, 35(4): 327-333. DOI： 10.13870/j.cnki.stbcxb.2021.04.045.

摘要

为了探讨淡水资源匮乏地区微咸水与再生水的安全合理利用，通过盆栽上海青试验，以清水灌溉为对照，设置再生水灌溉（T1）、微咸水—再生水1∶2灌溉（T2）、微咸水—再生水1∶1灌溉（T3）、微咸水灌溉（T4）4种灌溉方式，研究了不同比例微咸水与再生水混合灌溉对土壤水盐、作物生物量（地上部和地下部）、叶片叶绿素含量、可溶性蛋白含量、丙二醛（MDA）含量、过氧化氢酶（CAT）活性、超氧化物歧化酶（SOD）活性、过氧化物酶（POD）活性的影响。结果表明：（1）上海青收获后，不同比例微咸水与再生水混合灌溉处理土壤含水率和含盐量较清水灌溉（CK）均有所升高，其中T1、T2、T3处理土壤含水率与CK差异不显著，T4处理土壤含水率较CK差异显著（P<0.05），而各处理土壤含盐量与CK均差异显著；与T1处理相比，随着灌溉水中微咸水比重的升高，土壤含水率逐渐升高，且至T4处理时差异显著。（2）微咸水与再生水混灌对上海青地上部鲜重有一定影响，而对地上部干重以及地下部生物量无显著影响。与T1相比，T2、T3、T4处理上海青地上部鲜重均显著降低（P<0.05），降幅为24.78%~26.36%，地上部干重亦均降低，但差异不显著，降幅为19.14%~24.54%，地下部鲜重和干重无显著性变化。（3）微咸水与再生水混灌对上海青生理指标（叶绿素含量、可溶性蛋白含量、MDA含量、POD活性、CAT活性）没有显著影响，对SOD活性具有显著的提升作用。与T1相比，T2、T3、T4处理叶绿素a含量分别降低4.98%，3.82%和9.26%，叶绿素b含量分别降低10.88%，8.20%和13.46%，叶绿素总量分别降低9.76%，6.12%和10.15%，CAT活性分别提高8.51%，8.51%和-19.15%，POD活性分别提高1.92%，17.24%和-2.87%，SOD活性分别提高104.07%，62.20%和41.67%。随着混合液中微咸水比重的升高，上海青可溶性蛋白含量先降低后升高，MDA含量先升高后降低。（4）基于第二代综合生物响应指数（integrated biological response version 2，IBRv2），综合考虑土壤水盐、作物生理指标以及再生水资源本身的局限性，在淡水资源匮乏地区利用微咸水灌溉时，可以考虑用再生水作为替代清水水源与微咸水配合使用，微咸水—再生水混灌比例以1∶1为宜。研究结果可为淡水不足地区利用微咸水（3 g/L）灌溉提供参考。

Abstract

It is an effective way to alleviate the scarcity of fresh water resources to use unconventional water resources. In areas rich in brackish water

the freshwater resources are generally inadequate

but there are abundant reclaimed water resources. In order to explore the reasonable utilization of brackish water and reclaimed water in areas where freshwater was scarce

by using Shanghai green pot experiment

this research studied the soil salt-water dynamics

crop biomass including aboveground biomass and underground biomass

and crop physiological characteristics such as chlorophyll content of leaves

soluble protein content

malondialdehyde (MDA) content

activities of catalase(CAT)

superoxide dismutase (SOD)

and peroxidase (POD) under mixed irrigation of brackish water and reclaimed water at different ratios. There were four treatments

including reclaimed water irrigation (T1)

mixed irrigation of brackish water and reclaimed water at 1∶2 (T2)

mixed irrigation of brackish water and reclaimed water at 1∶1 (T3) and brackish water irrigation (T4)

taking the fresh water irrigation (CK) as control. The saline degree of brackish water was 3 g/L. The results indicated that: (1) Both soil water content and soil salt content were improved under different mixed irrigation compared with CK

among which

the difference of soil water content under T4 and CK reached a significant level (P<0.05)

and no difference between T1

T3 and CK. While

soil salt contents in all mixed irrigation treatments had significant differences with CK. Compared with T1

soil water content and soil salt content (except T2 and T3) gradually increased significantly with the increase of brackish water proportion in the mixed solution. (2) Mixed irrigation with brackish water and reclaimed water affected aboveground fresh weight of crop while mixed irrigation had no obvious effects on aboveground dry weight and underground biomass. Compared with T1

aboveground fresh weights under T2

and T4 decreased by 24.78% to 26.36% significantly

aboveground dry weights reduced by 19.14% to 24.54% insignificantly

and the fresh and dry weight of underground changed slightly. (3) Mixed irrigation with brackish water and reclaimed water promoted the activity of SOD significantly

but had no obvious effects on crop physiological characteristics including chlorophyll content

soluble protein content

MDA content

POD activity and CAT activity. Compared with T1

chlorophyll-a content decreased by 4.98%

3.82% and 9.26%

chlorophyll-b content reduced by 10.88%

20% and 13.46%

total chlorophyll content decreased by 9.76%

6.12% and 10.15%

CAT activity improved by 8.51%

8.51% and -19.15%

POD activity increased by 1.92%

17.24% and -2.87%

and SOD activity improved by 104.07%

62.20% and 41.67% respectively under T2

T3 and T4. The soluble protein content decreased first and then increased while MDA content increased first and then decreased with the increase of brackish water proportion in mixed solution. Therefore

considering soil water-salt dynamic

crop physiological characteristics and the limits of reclaimed water

it could be used as an alternative source of fresh water to mix with brackish water (3 g/L)

the suitable mixed proportion would be 1∶1 based on the integrated biological response version 2 (IBRv2). The research results could provide the reference for the utilization of brackish water in the areas where fresh water is short.

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