Corn has begun to be sown in full swing, and farmers with high yields in maize are also more concerned. A farmer asked: "In the past, when planting corn, when four or five leaves grew, the leaves were yellow and white, at first I thought that the amount of herbicide was too large, and the leaves were caused by drug damage, I sprayed it with brassica and fertilizer, and there was no relief of the drug damage." Later, experts said that it was zinc deficiency, is zinc fertilizer really so important? ”
Zinc is one of the elements needed in the growth process of corn, and in recent years, many plots have symptoms of zinc deficiency. That is to say, corn has white stripes on the leaves at the seedling stage, and the plant is short, which is a typical feature of zinc deficiency. In addition, zinc deficiency in the late growth stage, there is seed deficiency baldness, and yield is reduced. Therefore, many growers also pay more attention to the use of zinc fertilizer, which can improve the growth and yield of seedlings.
Farmers asked: "Why are there more symptoms of zinc deficiency in recent years, and there have been few zinc deficiency cases before." ”
Zinc deficiency on the one hand is the lack of zinc in the soil, which needs to be supplemented at the time of planting, on the other hand, the lack of zinc caused by the unreasonable fertilization habits of farmers, for example, corn is more sensitive to phosphate fertilizer, promote the growth of roots, but too much phosphorus, will also affect the absorption of zinc. And now farmers pay more attention to the use of trace elements, which has become one of the ways to increase production. So, can the zinc deficiency of corn be solved by seed mixing?
First of all, zinc fertilizer is commonly used is zinc sulfate, it can be used to mix seeds for corn, first dissolve zinc sulfate with hot water, and then mix the seeds well, dry and then sow, in general, 1 kg of seeds with 2 grams of zinc sulfate plus the right amount of water to mix seeds. However, the effect of mixing seeds with zinc fertilizer in corn is not as good as base fertilizer, soaking seeds or topdressing.
If the maize plot has obvious zinc deficiency plots, the application of bottom fertilizer and foliar spraying should be done. When zinc sulfate is used as a bottom fertilizer, it can be used 2 to 3 catties per mu, mixed with other fertilizers and applied. Or use zinc sulfate and other fertilizers to mix as seed fertilizer, the effect is also good.
Zinc sulfate as corn topdressing, generally in the seedling stage and jointing period foliar spraying, sprayed every 7 to 10 days, the effect of using two times is better, generally each bucket of water with 15 to 20 grams of zinc sulfate, add 30 pounds of water for spraying, and mixed with other fertilizers or pesticides, pay attention to acidity and alkalinity.
The use of zinc fertilizer to mix seeds is more suitable for plots with good soil conditions and zinc deficiency that are not obvious, and have the effect of increasing yield. For some soils with less zinc content and acidic soil, these plots are planted in corn, if the symptoms of zinc deficiency are more obvious, individuals recommend that zinc fertilizer be used as a bottom fertilizer, combined with foliar spraying at the seedling stage, such a method to increase yield is more obvious, if only with seed mixing, it may be difficult to meet the growth needs of corn.