The Latest Fertilization Techniques and Methods Tutorial for Sorghum
Sorghum is an important economic and food crop in China, grown in all regions. Its adaptability to soil is extremely strong, but in soil with higher fertility it is relatively easy to obtain high yields, while when grown in poorer areas the yield will decline. So when planting sorghum, fertilization is the key point for achieving high yields. So how should sorghum be fertilized? Let's take a look.
1. Fertilize according to variety characteristics
When planting, carefully observe the fertilizer requirements of the variety. For varieties that like fertilizer, use fully decomposed organic fertilizer as the base fertilizer. When fertilizing, apply more organic or inorganic fertilizer. Generally, apply 2000 to 3000 kg of organic fertilizer per mu, and topdress 2-3 times throughout the growth process to ensure it has enough fertility to grow. When topdressing, apply high-efficiency chemical fertilizers such as urea and phosphorus-potassium fertilizer. For varieties with low fertilizer requirements and a shorter growth period, organic fertilizer can be applied as the base fertilizer, and the amount and number of topdressings should be small. Generally, 1 topdressing is enough. If enough base fertilizer is applied, there is no need to topdress.
⟦NL>2. Fertilize according to soil conditions
When planting, choosing loose and fertile soil is the preferred option for growing sorghum, but not every region has such soil, so when fertilizing, also pay attention to the soil's fertility and properties. If the soil has low fertility, mainly use organic fertilizer when applying, combined with phosphate fertilizer; for soil with poor water retention and fertilizer retention, mainly use topdressing, with base fertilizer as a supplement. Each topdressing should be applied in small amounts multiple times. Otherwise, if a large amount is applied at once, but the soil has poor fertilizer retention, it will lead to a waste of fertility. If the soil pH is relatively high, forming acidic or alkaline soil, these two soils will have a certain impact on the quality and yield of sorghum. When planting, for acidic soil, lime nitrogen and calcium magnesium phosphate can be applied, while for alkaline soil, ammonium sulfate or superphosphate can be applied to adjust their acidity and alkalinity, making them neutral and suitable soil for sorghum growth.
3. Fertilize according to climate
Climate changes also affect sorghum growth, and fertilization is no exception. Fertilize according to climate changes. For example, in early spring, when the temperature is relatively low, it is suitable to use phosphorus and potassium fertilizer as seed fertilizer to promote seed germination and seedling emergence. In the early and middle stages of seedling growth, as the climate gradually warms up, it is suitable to apply nitrogen fertilizer to promote rapid seedling growth. In the later stage of growth, the temperature begins to drop again. At this time, phosphorus-potassium fertilizer should be sprayed on the leaves to promote maturity and improve yield and quality.
4. Fertilize according to fertilizer properties
When fertilizing, understand the role and properties of each fertilizer so that sorghum can grow quickly. Nitrogen fertilizers such as human and animal manure and urea take effect quickly and are suitable for topdressing, while organic fertilizer takes effect slowly. Phosphorus and potassium fertilizers have low mobility and are suitable for use as base fertilizer or seed fertilizer.
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