Optimal irrigation regime for woody species potentially suitable for effective and sustainable afforestation in the desert region of mongolia

Issue Date

2-2021

Abstract

Long-term studies on plant response mechanisms to different irrigation regimes will pro-vide a better understanding of the survivability and establishment of plant communities in a desert environment. Thus, across 10 years, we regularly investigated the effects of the rainfall (control), rainfall + 4 L h−1, rainfall + 8 L h−1, and rainfall + 12 L h−1 irrigation regimes on the growth and leaf morpho-physiology of Tamarix ramosissima Ledeb., Ulmus pumila L., Elaeagnus moorcroftii Wall. ex Schltdl., and Hippophae rhamnoides L. to suggest an optimal irrigation regime for each woody species for effective and sustainable afforestation in Mongolia. We measured the root collar diameter (RCD), annual height growth, survivability, leaf area (LA), specific leaf area (SLA), leaf biomass (LB), total chlorophyll concentration, and predawn (ψp) and midday (ψm) leaf water potentials across the treatments and species. Results showed that trees grown at 12 L h−1 grew taller per year and generally resulted in a higher SLA, but generally resulted in a lower survival rate compared with those in the other treatments in all species. Total chlorophyll content was higher in trees grown under 4 and/or 8 L h−1, particularly for T. ramosissima and E. moorcroftii. Lastly, leaf water potentials were found more negative for trees subjected to 4 L h−1, especially in T. ramosissima and U. pumila, but still resulted in a higher survival rate and LB compared with 12 L h−1. H. rhamnoides showed higher survivability at 8 and/or 12 L h−1 than at 4 L h−1. Therefore, we suggest 4 L h−1 to be the optimal irrigation regime for irrigating T. ramosissima, U. pumila and E. moorcroftii, and 8 and/or 12 L h−1 for H. rhamnoides. Our findings are relevant to ensuring the sustainability of afforestation programs in arid and semiarid landscapes in Mongolia.

Source or Periodical Title

Land

Volume

10

Issue

2

Page

2-18.

Document Type

Article

Physical Description

7 graphs; map; 2 tables; 77 Bibliography. Supplementary Materials. Received Feb 2021.

Language

English

Subject

Arid and semiarid, Desertification, Elaeagnus moorcroftii, Green belt plantation, Morpho-physiology, Tamarix ramosissima, Ulmus pumila

Identifier

https://doi.org/10.3390/land10020212

Digital Copy

yes

En – AGROVOC descriptors

ARID AND SEMIARID; DESERTIFICATION; ELAEAGNUS MOORCROFTII; GREEN BELT PLANTATION; MORPHOPHYSIOLOGY; TAMARIX RAMOSISSIMA; ULMUS PUMILA

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