基于同位素示踪的不同生境果草复合系统水分利用策略

赵玲; 张露; 赵妮; 戈建珍; 金晶炜

doi:10.13870/j.cnki.stbcxb.2022.01.013

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基于同位素示踪的不同生境果草复合系统水分利用策略

更新时间：2025-03-12

- 基于同位素示踪的不同生境果草复合系统水分利用策略
- Water Use Strategy of Fruit-Grass Complex Systems in Different Habitats Based on Isotope Tracer
- 水土保持学报 2022年36卷第1期页码：86-94
- 作者机构：
  
  1. 西北农林科技大学草业与草原学院, 陕西杨凌,712100
  2. 西藏自治区墨竹工卡县农业农村局,拉萨,850000
  3. 北京理加联合科技有限公司,北京,100085
  4. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  5. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
  
  [ "赵玲(1986—), 女, 在读硕士研究生, 主要从事土壤—植物系统水分循环研究。E-mail: 554914221@qq.com" ]
- 基金信息：
  
  陕西省重点研发计划项目(2021NY-006);国家自然科学基金项目(31601987);国家现代农业产业技术体系项目(CARS-34)
- DOI：10.13870/j.cnki.stbcxb.2022.01.013
  中图分类号： S812.2
- 纸质出版：2022
- 稿件说明：
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赵玲, 张露, 赵妮, 等. 基于同位素示踪的不同生境果草复合系统水分利用策略[J]. 水土保持学报, 2022,36(1):86-94.

ZHAO Ling, ZHANG Lu, ZHAO Ni, et al. Water Use Strategy of Fruit-Grass Complex Systems in Different Habitats Based on Isotope Tracer[J]. 2022, 36(1): 86-94.
赵玲, 张露, 赵妮, 等. 基于同位素示踪的不同生境果草复合系统水分利用策略[J]. 水土保持学报, 2022,36(1):86-94. DOI： 10.13870/j.cnki.stbcxb.2022.01.013.

ZHAO Ling, ZHANG Lu, ZHAO Ni, et al. Water Use Strategy of Fruit-Grass Complex Systems in Different Habitats Based on Isotope Tracer[J]. 2022, 36(1): 86-94. DOI： 10.13870/j.cnki.stbcxb.2022.01.013.

摘要

为明确不同生境果草复合系统的水分利用策略。利用稳定同位素示踪方法

研究不同生境(陕西关中杨凌和陕北洛川)单作苹果(SA)和果草复合系统(苹果+白三叶(AW)、苹果+黑麦草(AR))土壤水、木质部和茎部水的氢、氧同位素值

利用直接对比法和IsoSource模型分析不同生境下果草复合系统在不同季节的水分利用策略。结果表明: 不同生境下

陕西关中杨凌土壤含水量在垂直方向上的波动较陕北洛川大

杨凌地区40—80 cm土层土壤水分的消耗大于洛川地区

杨凌果园旱季种植白三叶会加大深层土壤水分的消耗。旱季时

洛川地区果树主要利用土壤水深度为40—100 cm(63.0%)

牧草为0—20 cm(65.0%); 杨凌地区果树水分利用层位较洛川低

SA和AW的果树为20—40 cm(54.3%)

AR为40—100 cm(65.0%)

白三叶和黑麦草分别为0—20 cm(59.3%)和20—40 cm(62.2%)。雨季时

两地果树水分来源层位相同

SA主要利用20—40 cm

AW和AR主要利用40—100 cm

牧草介入使果树吸水层位下移。结果说明

不同生境下

果草复合系统会随季节变化调整水分利用策略

洛川地区果草复合系统对水分变化的响应更快

在水分不足时加大对深层土壤水的利用

避免水分竞争

对生境异质的适应机制较杨凌地区好。杨凌地区果草复合系统对土壤起到蓄水作用

但旱季会加大深层土壤水分消耗

应适时补充灌溉。

Abstract

In order to determine the water use strategy of fruit-grass complex system in different habitats

we studied the hydrogen and oxygen isotopic values of soil water

xylem and stem water of single cropping apple (SA) treatment and fruit grass composite systems (apple+white clover (AW)

apple+ryegrass (AR)) in Yangling of Guanzhong and Luochuan of Northern Shaanxi. Direct comparison method and IsoSource model were used to analyze the water use strategy of fruit-grass complex systems in different seasons under different habitats. The results showed that under different habitats

the vertical fluctuation of soil water content of orchard in Yangling area was larger than that in Luochuan area. The consumption of soil water in 40—80 cm layer in Yangling was greater than that in Luochuan. The planting of white clover in Yangling orchard in dry season would increase the consumption of deep soil water. In the dry season

the depth of soil water mainly used by apple trees was 40—100 cm (63.0%)

and that of the forage was 0—20 cm (65.0%). The water use level of apple trees in Yangling was lower than that in Luochuan. The depth of soil water used by apple trees in SA and AW was 20—40 cm (54.3%)

that in AR was 40-100 cm (65.0%). The depth of soil water used by white clover and ryegrass was 0—20 cm (59.3%) and 20—40 cm (62.2%)

respectively. In the rainy season

the water source layer of apple trees in both places were the same

the depth of soil water used by apple tree in SA was 20—40 cm

that in AW and AR was 40—100 cm. And the forage intervention moved down the water absorption layer of apple trees. The results indicated that the fruit-grass complex system could adjust its water use strategy with the seasonal changes in different habitats. The fruit-grass complex system in Luochuan area responded more quickly to the water change

and increased the use of deep soil water when water was insufficient to avoid water competition. And it had a better adaptation mechanism to habitat heterogeneity than that in Yangling. In Yangling area

the fruit-grass complex system could store soil water

but would increase the consumption of deep soil water in the dry season

so it should be supplemented with irrigation timely.

关键词

Keywords

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