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Multiple-source characteristics of crop water use strategy in hyper-arid regions

Phys.org/news (SEPTEMBER 14, 2022)

Titre : Multiple-source characteristics of crop water use strategy in hyper-arid regions

The shortages of water resources and unsustainable water resource management are more prominent in arid and semi-arid areas. The mismatch between water supply schemes and the characteristics of root water uptake leads to lower water use efficiency of crops in these regions.

Phys.org/news (SEPTEMBER 14, 2022)

Présentation
Isotope technology, an accurate, quick, and non-destructive method, can be used to explore water use strategy of plants. Affected by multiple water sources and hyper-arid climate, the characteristics of root water uptake in crops are extremely complicated in oasis agroecosystems.

Interestingly, from the jointing stage to the dough stage, the depth of root water uptake in maize was from shallow to deep, but after the dough stage, the depth of root water uptake in maize was from deep to shallow.

Affected by various water sources, root water uptake patterns in crops became complicated with growth stage. The contributions of soil water in 0–20 cm, 20–40 cm, 40–60 cm, and 60–100 cm soil layers to root water uptake in maize were 30%, 12%, 15%, and 43%, respectively. Crops prefer to absorb irrigation water and groundwater in oasis farmlands.

This finding provides a guide for optimizing water use strategies in oasis agroecosystem in hyper-arid regions.

Source  : Li Yuan, Chinese Academy of Sciences

Annonce (Phys.org/news)

Page publiée le 14 janvier 2023