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Physiological density12/23/2023 occidentalis is very salt tolerant and photosynthesis functioned reasonably well at high salinities, extremely high salinity did decrease dry mass of roots and shoots. Net photosynthesis increased at low salinity (200 mM), but photosynthesis at other salinities was not significantly different from the control. Na⁺ and Cl⁻ concentration in shoots and roots increased when NaCl level was increased while K⁺, Ca⁺⁺, Mg⁺⁺, SO₄, and NO₃⁻ contents decreased. In other words, we can describe it as the number of people that inhabit lands that are suitable for growing crops. Inorganic ions, especially Na⁺ and Cl⁻, contributed substantially to dry mass. Physiological density is the term used for the number of people per unit area of arable land. Water potential of the plants became more negative with increasing salinity due to the accumulation of NaCl in the leaves. Tissue water content was highest at the 200 mM NaCl treatment and decreased with increased salinity. Dry mass of roots was highest at 600 mM NaCl at low density (2000 plants m⁻¹), but declined as salinity increased. A higher physiological density indicates that more agricultural land is being used, and that it may reach its output limit sooner than a country with a lower physiological density. Plants were grown in a sand culture using subirrigation. occidentalis, a stem succulent inland halophyte, were studied under controlled greenhouse conditions. Effects of salinity (0, 200, 400, 600, 800, and 1000 mM NaCl) and 3 planting densities (2000, 4000, 6000 plants m⁻²) on the growth, survival, and ecophysiology of A. ![]() Physiological responses of Allenrolfea occidentalis to salinity and seedling density were investigated.
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