Zinc is a necessary trace element for rice growth and development. After transplanting rice, zinc-deficient rice seedlings appear, and the appearance of the middle lobe of the lower lobe occurs with yellowing and whitening of the middle lobe, with brown spots and irregular patches on the upper leaves, and a reddish-brown development. Bars, which turn reddish-brown from the tips of the leaves; and appear on the lower pages and upper leaves in turn. The new leaves are short and narrow, the leaves are faded, and the midrib veins retreat to yellow-white. Seriously ill plant leaf spacing is short or dislocated, severely dwarfed, and rarely delivered. The growth of rice plants in the field is uneven, and fertility is delayed. Ten days after transplanting in field, if the rice seedlings lack zinc, the above symptoms are slowly shown. It is too late to use zinc as a base fertilizer. At this time, foliar spraying method can be used to supplement zinc, and 0.1% can be added. The concentration of sprayed zinc sulfate, usually sprayed 2-3 times, once every 7 days, at the same time make drainage and ventilation management, so as to prevent loss due to zinc deficiency in rice.
pharmaceutical blister Packaging
Pharmaceutical Packaging,Pharma Blister Packaging,Blister Packaging Medication,Pharmaceutical Blister Packaging
taicang hexiang packaging material co.,ltd , https://www.medpackhexiang.com