不同灌水量对胡杨幼龄林叶水势与土水势的影响

doi:10.6048/j.issn.1001-4330.2022.05.009

新疆农业科学 ›› 2022, Vol. 59 ›› Issue (5): 1110-1118.DOI: 10.6048/j.issn.1001-4330.2022.05.009

不同灌水量对胡杨幼龄林叶水势与土水势的影响

何宇翔¹(), 武胜利¹(), 韩炜¹, 管文轲²

1.新疆师范大学地理科学与旅游学院/新疆干旱区湖泊环境与资源重点实验室/新疆师范大学实验室与设备管理处,乌鲁木齐 830054
2.新疆林业科学院,乌鲁木齐 830000

收稿日期:2021-12-23 出版日期:2022-05-20 发布日期:2022-06-09
通信作者: 武胜利
作者简介:何宇翔(1996-),男,山西汾阳人,硕士研究生,研究方向为干旱区环境演变与气候变化,(E-mail) 873924001@qq.com
基金资助:
新疆维吾尔自治区科技支撑专项“塔里木河中下游胡杨生态修复研究与示范”(HY-2.3)

Effects of Different Irrigation Rates on Leaf Water Potential and Soil Water Potential of Populus euphratica Forest

HE Yuxiang¹(), WU Shengli¹(), HAN Wei¹, GUAN Wenkai²

1. College of Geographical Science and Tourism, Xinjiang Normal University/Key Laboratory of Lake Environment and Resources in Xinjiang Drought Zone, Xinjiang Normal University/Laboratory and Equipment Management Office of Xinjiang Normal University,Urumqi 830054, China
2. Xinjiang Academy of Forestry Sciences, Urumqi 830000,China

Received:2021-12-23 Online:2022-05-20 Published:2022-06-09
Correspondence author: WU Shengli
Supported by:
Special Science and Technology Support Project of Xinjiang Uygur Autonomous Region "Research and demonstration of Populus euphratica Ecological Restoration in the Middle and Lower Reaches of the Tarim River"(HY-2.3)

摘要/Abstract

摘要：

【目的】研究不同灌水量对胡杨幼龄林叶水势、土水势的影响,为引洪灌水胡杨幼龄林提供技术支撑。【方法】以塔里木河中下游沿岸2~4年的胡杨幼龄林为研究对象,设置不同灌水量(20、40、60 L/m²)处理,采用WP4C露点水势仪、TPSBR-SZL传感器测定胡杨叶水势、土水势,采用WET型土壤三参数速测仪测定灌水前后土壤含水量、温度、电导率。【结果】胡杨叶水势与土水势均呈现出60 L/m²>40 L/m²>20 L/m²>CK的规律,胡杨叶水势日变化整体呈现早晚高、中午低的单峰“V”型特征;不同灌水量处理的土壤含水量均高于CK,而土壤温度、电导率均低于CK,40和60 L/m²处理的叶水势与土水势日变化均小于20 L/m²与CK;土壤含水量多少影响胡杨幼树水势的高低,土壤电导率与温度降低有利于降低土壤盐分。【结论】多次灌水对干旱区胡杨幼树的生长有着明显的促进作用;叶水势与土水势日变化差异为60 L/m²<40 L/m²<20 L/m²<对照;2年生、3年生、4年生胡杨最优的灌水量分别为60、40、20 L/m²。

关键词: 胡杨; 幼龄林; 叶水势; 土水势; 灌水量

Abstract:

【Objective】 To study the effects of different irrigation rates on leaf water potential and soil water potential of Populus euphratica forest, and to provide technical support for scientific flood diversion irrigation of Populus euphratica forest. 【Methods】 Populus euphratica forests of 2 to 4 years along the middle and lower reaches of Tarim River was taken as the research object, different irrigation rates (20,40 and 60 L/m²) were set up. WP4C dew-point water potential meter and TPSBR-SZL sensor were used to measure leaf water potential and soil water potential of Populus euphratica, and WET three-parameter soil tachymeter was used to measure soil water content, temperature and electrical conductivity before and after irrigation. 【Results】 The diurnal variation of leaf water potential and soil water potential of Populus euphratica under different irrigation rates showed a pattern of 60 L/m²>40 L/m²>20 L/m²>CK. The diurnal variation of leaf water potential of Populus euphratica showed a single-peak "V" shape, which was higher in the morning and lower after the noon. The diurnal variation of leaf water potential and soil water potential under 40 and 60 L/m² treatments were all less than that under 20 L/m² and CK. The soil water content affected the water potential of Populus euphratica, and the decrease of soil conductivity and temperature was beneficial to the decrease of soil salt. 【Conclusion】 Repeated irrigation promotes the growth of Populus euphratica trees in arid area. The diurnal variation of leaf water potential and soil water potential is 60 L/m²<40 L/m²<20 L/m²<CK. The optimal irrigation rate for 2 year, 3 year and 4 year Populus euphratica is 60 L/m², 40 L/m² and 20 L/m², respectively.

Key words: Populus euphratica; young forest; leaf water potential; soil water potential; irrigation water rate

中图分类号:

S727.23

何宇翔, 武胜利, 韩炜, 管文轲. 不同灌水量对胡杨幼龄林叶水势与土水势的影响[J]. 新疆农业科学, 2022, 59(5): 1110-1118.

HE Yuxiang, WU Shengli, HAN Wei, GUAN Wenkai. Effects of Different Irrigation Rates on Leaf Water Potential and Soil Water Potential of Populus euphratica Forest[J]. Xinjiang Agricultural Sciences, 2022, 59(5): 1110-1118.

图/表 5

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树龄 Tree-age (a)	不同灌水量 Different irrigation quantities	最大值 Maximum value (MPa)	最小值 Minimum value (MPa)	均值 Mean (MPa)	标准差 Standard deviation
2	W_2a-20	-0.44	-1.98	-1.04	0.46
	W_2a-40	-0.11	-0.57	-0.29	0.14
	W_2a-60	-0.11	-0.25	-0.16	0.05
	CK_2a	-0.21	-2.33	-1.43	0.86
3	W_3a-20	-0.11	-0.57	-0.29	0.13
	W_3a-40	-0.10	-0.21	-0.16	0.04
	W_3a-60	-0.05	-0.22	-0.13	0.03
	CK_3a	-0.19	-2.33	-1.35	0.87
4	W_4a-20	-0.08	-0.25	-0.16	0.05
	W_4a-40	-0.09	-0.22	-0.15	0.04
	W_4a-60	-0.08	-0.22	-0.15	0.03
	CK_4a	-0.19	-2.33	-1.21	0.87

树龄 Tree-age (a)	不同灌水量 Different irrigation quantities	最大值 Maximum value (MPa)	最小值 Minimum value (MPa)	均值 Mean (MPa)	标准差 Standard deviation
2	W_2a-20	-0.44	-1.98	-1.04	0.46
	W_2a-40	-0.11	-0.57	-0.29	0.14
	W_2a-60	-0.11	-0.25	-0.16	0.05
	CK_2a	-0.21	-2.33	-1.43	0.86
3	W_3a-20	-0.11	-0.57	-0.29	0.13
	W_3a-40	-0.10	-0.21	-0.16	0.04
	W_3a-60	-0.05	-0.22	-0.13	0.03
	CK_3a	-0.19	-2.33	-1.35	0.87
4	W_4a-20	-0.08	-0.25	-0.16	0.05
	W_4a-40	-0.09	-0.22	-0.15	0.04
	W_4a-60	-0.08	-0.22	-0.15	0.03
	CK_4a	-0.19	-2.33	-1.21	0.87

树龄 Tree-age	不同灌水量 Different irrigation quantities	最大值(MPa) Maximum value	最小值(MPa) Minimum value	均值(MPa) Mean	标准差 Standard deviation
2	W_2a-20	-0.11	-0.40	-0.21	0.09
	W_2a-40	-0.13	-0.17	-0.15	0.01
	W_2a-60	-0.09	-0.16	-0.13	0.02
	CK_2a	-0.15	-0.44	-0.28	0.10
3	W_3a-20	-0.13	-0.17	-0.16	0.01
	W_3a-40	-0.11	-0.40	-0.21	0.09
	W_3a-60	-0.05	-0.14	-0.10	0.03
	CK_3a	-0.17	-0.43	-0.28	0.09
4	W_4a-20	-0.11	-0.18	-0.15	0.02
	W_4a-40	-0.08	-0.16	-0.13	0.03
	W_4a-60	-0.08	-0.18	-0.12	0.03
	CK_4a	-0.15	-0.40	-0.27	0.09

树龄 Tree-age	不同灌水量 Different irrigation quantities	最大值(MPa) Maximum value	最小值(MPa) Minimum value	均值(MPa) Mean	标准差 Standard deviation
2	W_2a-20	-0.11	-0.40	-0.21	0.09
	W_2a-40	-0.13	-0.17	-0.15	0.01
	W_2a-60	-0.09	-0.16	-0.13	0.02
	CK_2a	-0.15	-0.44	-0.28	0.10
3	W_3a-20	-0.13	-0.17	-0.16	0.01
	W_3a-40	-0.11	-0.40	-0.21	0.09
	W_3a-60	-0.05	-0.14	-0.10	0.03
	CK_3a	-0.17	-0.43	-0.28	0.09
4	W_4a-20	-0.11	-0.18	-0.15	0.02
	W_4a-40	-0.08	-0.16	-0.13	0.03
	W_4a-60	-0.08	-0.18	-0.12	0.03
	CK_4a	-0.15	-0.40	-0.27	0.09

不同灌水量对胡杨幼龄林叶水势与土水势的影响

Effects of Different Irrigation Rates on Leaf Water Potential and Soil Water Potential of Populus euphratica Forest

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