A Comprehensive Analysis of the Fertilizer Requirements of Winter Wheat
The winter wheat sowing season has now arrived, and everyone is gradually carrying out the preparatory work before sowing winter wheat. Winter wheat is relatively cold-resistant, but it still needs sufficient nutrients to improve its growth capacity and ensure it can successfully overwinter. However, many people do not strictly control the nutrient ratio of fertilizers, which leads to failed wheat planting and extremely low yields. Today, the editor brings you the fertilizer requirement characteristics of wheat, so let's take a look below!
1. Fertilizer requirement characteristics
Winter wheat has a relatively large fertilizer requirement, and its demand for nitrogen, phosphorus and potassium fertilizers varies. Moreover, with different winter wheat varieties and growth stages, the degree of demand also differs greatly, and the application ratio of nitrogen, phosphorus and potassium must also be determined according to the planting region, climate environment and planting method, among other aspects. However, there are still general patterns to follow: the demand ratio of nitrogen, potassium and phosphorus for winter wheat throughout the entire growth period is roughly 3:3:1.
2. Nitrogen fertilizer requirement
During the growth period, winter wheat has a relatively large demand for nitrogen fertilizer, and the application of nitrogen fertilizer should be reasonably controlled according to the growth progress of winter wheat. Among these, when winter wheat is at the seedling stage and tillering, the proportion of nitrogen fertilizer demand reaches 1/5. This is because when winter wheat is at the seedling stage, it is winter, and the low winter temperature is very unfavorable to seedling growth. At this time, sufficient nitrogen fertilizer is needed to enhance the cold resistance of the seedlings and increase the growth rate. Then, when winter wheat grows to the jointing stage, it is the time when winter wheat has the strongest growth capacity, and the demand for nitrogen fertilizer also rises sharply. This is the period of the entire growth period of winter wheat when the demand for nitrogen fertilizer is greatest. However, nitrogen fertilizer must not be excessive; otherwise, it will cause excessive tillering growth, resulting in excessive vegetative growth and leggy growth, leading to a large winter wheat plant population but poor quality.
3. Phosphorus fertilizer requirement
When winter wheat grows to the flowering stage, its demand for phosphorus fertilizer is the greatest, and the phosphorus fertilizer demand at the flowering stage reaches 7/10 of the phosphorus fertilizer for the entire growth period. During this period, sufficient phosphorus should be ensured, which is beneficial to the differentiation of winter wheat flower spikes and promotes wheat photosynthesis, increasing the accumulation of carbohydrates in wheat. The next most important period is the greening stage of winter wheat. Although the demand is far less than at the flowering stage, phosphorus at the greening stage also has a great impact on the growth of winter wheat. It can promote the differentiation of winter wheat, improve the rooting ability of the roots, and increase the number of tillers and new leaves. It can protect winter wheat for a good overwintering, so when applying base fertilizer, we must increase the proportion of phosphorus fertilizer.
4. Potassium fertilizer requirement
The demand for potassium fertilizer in the early growth stage of winter wheat is not too high. The period of greatest potassium demand is when winter wheat grows to the booting stage. The potassium demand at this period can reach 3/5 of the total, and it is also the period with the best potassium fertilizer conversion rate. Providing sufficient potassium fertilizer at this stage can make winter wheat grow robustly, improve the plant's nutrient absorption and transport, and accelerate the grain filling rate. When winter wheat reaches the flowering stage, the proportion of potassium fertilizer can be seen to gradually decrease, because too much potassium fertilizer will cause potassium exclusion. This not only wastes fertilizer, but also reduces the potassium content in the plant.
The above is the editor's brief introduction to the fertilizer requirement characteristics of winter wheat. Many friends only focus on the application of potassium fertilizer when planting winter wheat. They often neglect the two basic fertilizers, phosphorus and potassium. Excessive application of nitrogen fertilizer not only leads to insufficient nutrition for winter wheat, but also easily causes various problems, greatly affecting the growth of winter wheat. That is all for today's introduction. This article is for reference only. Thank you for your reading and support.