Zinc deficiency in rice requires early supplementation

Shandong Jiyang County is located on the north bank of the lower Yellow River. The Yellow River Rice produced by the local Shumen Township is famous in history. At this time in the past few years, when paddy rice was returned to green jointing, paddy fields should have been a piece of green oil. From the beginning of last year, the paddy rice began to yellow from the second to third weeks after transplanting rice, and some of the leaves also returned. Turning red, local farmers spray a lot of pesticides are not effective.

Recently, the author came to Wangji Village, Siumen Township, Jiyang County, and saw the following symptoms in the rice fields of the village peasants Wang Jixian and Wang Jiyuan: the tip of some rice plant leaves were dry, and some of the middle leaves of the village were brown or red brown. Irregular plaque, and gradually developed from the old leaves to the upper adjacent leaves. Through field diagnosis, it is a typical symptom of zinc deficiency in rice.

Zinc deficiency in rice generally begins to show symptoms 2 to 3 weeks after transplanting. Its symptoms include dry tips, yellow-brown and red-brown leaves, and irregular plaques. When the disease is severe, the rust on the old leaves expands into slices, showing strips. The growth rate of the leaves is significantly slowed down, the new leaves begin to become smaller, the chlorotic whitishness, and the plants shrink. In production, when the symptoms of zinc deficiency in rice were found, the loss was already great. Zinc deficiency is also easily confused with the lake leaf brown spot. According to our experiments in rice fields in recent years, when zinc deficiency is moderate, symptoms can gradually disappear if zinc is supplemented in a timely manner. If zinc deficiency is severe and timely remedy is not obtained, the entire plant will die and die. Therefore, zinc deficiency in rice should not be taken lightly and should be supplemented as early as possible.

Zinc can enhance the photosynthesis of crops, is conducive to the formation of auxin in the crop, and promote the growth and development of crops. Zinc can also promote the metabolism of nitrogen in crops and enhance the resilience of crops. Mild zinc deficiency in rice can cause delayed ripening, dissatisfaction with grain, and severely affecting yield. Therefore, farmers should not only use chemical fertilizers when planting rice, but should use chemical fertilizers, organic fertilizers, and trace element fertilizers.

The discovery of zinc deficiency in rice must be properly diagnosed and the right medicine should be prescribed. The prevention and control method is: when the current zinc-deficient paddy fields are topdressing, 30 kg of "Shenliu 54" trace element fertilizer is used per mu, which can be applied in paddy fields; combined with top dressing, foliar spraying with 0.1% to 0.2% of zinc sulfate solution Spraying should be selected before 9 am and after 4 pm.

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