What it does
Magnesium (Mg) deficiency impacts a number of enzyme actions in vegetation, together with carbon dioxide (CO2) assimilation and protein synthesis, and the mobile pH and the cation-anion steadiness activation.
It might cut back grain high quality (% milled rice, protein, and starch content material).
Why and the place it happens
Magnesium deficiency is comparatively uncommon particularly in irrigated rice methods.
Magnesium deficiency just isn’t continuously noticed within the discipline as a result of enough quantities are often provided in irrigation water. It’s extra frequent in rainfed lowland and upland rice the place soil Mg has been depleted due to the continual elimination of Mg with out recycling crop residues or changing eliminated Mg with mineral fertilizer. Many rainfed rice soils are inherently poor in Mg.
This will happen on the next soil varieties:
Easy methods to establish
Examine the plant for the next signs:
In extreme circumstances, chlorosis progresses to yellowing and eventually necrosis in older leaves. Leaf quantity and leaf size are larger in Mg-deficient vegetation, and Mg-deficient leaves are wavy and droopy on account of an growth within the angle between the leaf sheath and leaf blade.
With average deficiency, plant peak and tiller quantity should not affected enormously. Additionally test for:
Why is it necessary
Magnesium deficiency can happen all through the expansion cycle of the crop. Nevertheless, it’s not quite common in irrigated rice and thus tends to be of little financial significance.
Easy methods to handle – “magnesium rice”
There’s at present no sensible remedy possibility for Mg deficiency. The place potential: