What the Symptoms of Fertilizer Deficiency for Wheat?
Lack of fertilizer will affect the wheat normal growth, so we have to observe it in time. When the wheat is lack of fertilizer, we should apply fertilizer in time. What are the symptoms of wheat deficiency fertilizer? Here to give you some ways to analyze whether the wheat lack of fertilizer or not?
First, nitrogen fertilizer deficiency
The main symptoms of wheat nitrogen fertilizer deficiency are: plant is small and weakc,
tiller is little and weak, leaves are small and erect, leaf color is yellowish green, the top leaves of old leaves are dry, and gradually developed as yellow base leaves, stem sometimes is lavender. Top dressing fertilizer: first, we should use the fully decomposed organic fertilizer or enzyme bacteria retting composting; second, according to the soil census, use formula fertilization technology, prepare the special wheat fertilizer; third, the top dressing should be 700- 1000 kg of manure or 15-20 kg of ammonium sulfate per acre and it can also be sprayed 1.5% -2% urea solution 2-3 times.
Second, phosphorus fertilizer deficiency
The main symptoms of wheat phosphorus fertilizer deficiency are: the leaves are dark green with purple and dull, small plants, less tiller, secondary roots are little, the stem base is purple. Pre-growth and seedlings will be affected. The period of turning green, the top leaves are purple, mature time will be delayed. Top dressing fertilizer: 30-50 kg of calcium per acre, can also be sprayed with 1% -2% of the ordinary calcium clarification solution or 0.3% potassium dihydrogen phosphate solution 2-3 times.
Third, potassium fertilizer deficiency
The symptoms of wheat potassium deficiency are: the lower leaves will have yellow spots, starting from the tip of the old leaves, and then along the veins extend to inward, the boundary of macular and healthy part was clear. If it is serious, the old leaves and leaf margin will be charred. Top dressing fertilizer: Potassium sulphate or potassium chloride 7-10 kg per acre or 200 kg of vegetation ash. We can also sprayed with 1% potassium sulfate or potassium chloride solution or 0.3% potassium dihydrogen phosphate solution 2-3 times.
Four, zinc fertilizer deficiency
The symptoms of wheat zinc deficiency are: all leaves color is fade, the stop of the top leaves growth, the shortening of internodes, and the dwarfing of the plants. Top dressing fertilizer: 1 kg per acre topdressing zinc sulfate or spraying 0.2% zinc sulfate solution 2-3 times.
Five, manganese fertilizer deficiency
The symptoms of wheat manganese fertilizer deficiency mainly showed that the leaves were soft and thin, and the new veins were striated and loss of green and the veins remained green. Sometimes the leaves were light green and the yellow stripes were enlarged into brown spots. Top dressing fertilizer: 1 kg per acre of topdressing manganese sulfate or spray 0.1% of the manganese sulfate on foliage 2-3 times.
Six, boron fertilizer deficiency
The symptoms of Wheat boron deficiency are: tiller is
not normal or can not heading, even if it can head, it still can not have flower and fruit. Top dressing fertilizer: spray 0.1% -0.2% borax solution for foliar, 1 time every 7-10 days and spray 2-3 times.
Seven, molybdenum fertilizer deficiency
The symptoms of wheat molybdenum deficiency are: loss of green leaves, starting from the leaves of the old leaves to the edge of the leaves, and then spread from leaf margin to inward. There firstly appear spots, and then the spots come into being the line and the film, then turn to brown, and finally dying. Top dressing fertilizer: can spray 0.05% ammonium molybdate solution 1-2 times, interval time is 7-10 days.
The article is quoted from: https://www.fert.cn/news/2017/10/17/103834855710.shtml