Page de couverture de Why does rice need so much water?

Why does rice need so much water?

Why does rice need so much water?

Écouter gratuitement

Voir les détails du balado

À propos de cet audio

 Water intensive Jorth name ninis- th a Whv is rice such a flo- water-intensive cToD? Manv rice-growing systems deliberately flood the fields and most of the water is lost to the air or to the ground. Farmers often maintain shallow flooding to stabilise some nutrient dynamics. In many paddies, water also moves sideways or down the soil unless the field is rich in clav or well sealed. Flooding is an easy way to meet these goals but also expands the exposed water surface, so the total water demand rises. Second, the plant needs COz inside the leaf for photosynthesis. CO2 enters primarily through open open pores also allow water vapour to leave Third, rice is a C3 plant, and C3 photosynthesis is less water-efficient in hot or dry conditions than C4 (e.g. maize). In C3 plants, the main CO-fixing enzyme sometimes reacts with oxygen instead of COz. blant g by the soil. pite ith 3S- of ys is S- ds le, ing top on- nis le e 2 Finally, flooded soils are oxygen-poor because oxygen diffuses slowly through water. Most crops' roots struggle in these conditions. Rice is tolerant, however, because it develops air-filled channels that move oxygen from the shoots to the roots. stomata, but the sam
Pas encore de commentaire