How to improve the utilization rate of potassium fertilizer by planting sunflower?

How to improve the utilization rate of potash fertilizer by planting sunflowers? Sunflower is a kind of crop that needs a lot of potassium. The root system of sunflower can be up to 2 meters deep, most of the required nitrogen, phosphorus and potassium are supplied by the soil, and the deficiency should be regulated by fertilization. If too much nitrogen fertilizer is applied, it will increase the risk of lodging and disease, and lead to a decrease in oil content. Sunflowers absorb a large amount of potassium from the soil, and the potassium supply capacity of the soil can vary greatly depending on the soil parent material and ecological conditions. The potassium requirement of sunflower varies with the yield level and variety. For example, high-yielding sunflower hybrids will absorb more potassium. A large amount of potassium absorbed by potassium-loving crops, some of which is a luxury absorption, may not have a significant effect on yield, especially under normal growth conditions. However, under abnormal conditions such as drought, it plays a good role in improving the drought resistance and other stress resistance of sunflower. In order to improve the absorption of potassium fertilizer by sunflower, it can be improved from the following three aspects: first, soil conditions: the effect of applying potassium fertilizer in the soil with low available potassium content is obvious, at this time, potassium application can increase the oil content and oil yield of sunflower. The key lies in how to determine the critical level of soil potassium content. The content level of soil available potassium is the main factor that determines whether the application of potassium fertilizer is effective or ineffective. Planting sunflower on potassium-deficient soil must need potassium fertilizer to obtain a certain high yield. Generally speaking, for soils with rapidly available potassium content higher than the critical level, whether potassium is applied depends on what crops are planted and how much the target yield is. If you plant potassium-loving crops, the target yield is required to be high, even if there is no shortage of potassium in the soil. it is also necessary to choose an appropriate way to apply potassium fertilizer can still achieve results. The second is the target yield level and variety differences: different crops are planted in the same soil, their requirements for the critical level of soil potassium supply will be somewhat different. The oil content of sunflower seed is very high, and it is a crop with high potassium absorption, which requires a high critical level of soil available potassium. At the same time, the target yield level and the differences between varieties should also be considered. For example, the new high-yield hybrid sunflower requires that the critical level of soil potassium is higher than the general index level in order to obtain good yield and give full play to the variety potential of high yield and high oil. Third, irrigation conditions have a great impact on the efficiency of potash fertilizer, especially in the critical growth period, ensuring that irrigation can make crops use potash fertilizer effectively. If under drought condition, when sunflower is under water stress, potassium fertilizer is more important than nitrogen fertilizer, potassium application can improve the limited water use of sunflower and reduce the transpiration coefficient of sunflower. Therefore, the application of potash fertilizer under the same drought conditions is helpful to improve the drought resistance of sunflowers. Click to get more sunflower planting techniques click to get more food crop planting techniques