Q: What is the effect of potassium content and potassium fertilizer on farmland soil in China? A: The national level of potassium content is basically the distribution trend of high in the middle and low in two. The potassium content of all types of cultivated soil varies greatly, the lowest is 50 ml/kg (such as Leizhou Peninsula), the red soils in the coastal areas of Hainan, Guangdong, Fujian, and the red soil of Guangxi have the lowest potassium content, such as Guangxi Liuzhou and Yulin. Rice fields in the area often suffer from leaf spot disease due to potassium deficiency. The application of potash fertilizer to these soils has a significant effect. For example, applying potash fertilizer on the Chinese milk vetch, the yield increase rate is very high, and the effect of increasing nitrogen by potassium can be achieved. In the soils of Hunan, Hubei, Jiangxi, and Zhejiang, the effect of potash fertilizer production increase is also significant. In addition, the increase in production of duck mud in Hunan is also significant. In the red soil of Jiangxi and Fujian, the effect of potash fertilizer on sweet potato and soybean production was also significant. Q: What are the reasons for the lack of potassium in these soils in the South? A: These soils are all acidic soils. The general pH value is between 5.0 and 6.5. Individuals are still less than 5, and they are strongly acidic. The formation of acidic soils in the south is related to climate. It is located in a hot and humid area. Due to high temperature and rain, the soil decomposes and The mineralization process is accelerated, and the hydrolysis strength is increased by 100 to 200 times. The migration and leaching of elements in the soil are stronger. The element that is lost is firstly calcium, followed by potassium. Q: Are there test data on the loss of potassium from acidic soils in the south? A: Yes, for 48 consecutive years of long-term tests, after the application of potash fertilizer, the loss of potassium reached 71.5% in the acid soils of the southern paddy field, indicating that the loss was serious. The annual potassium loss in paddy fields in the Dongting Lake Basin reached 0.275 kg/mu. . In short, the climate in the south causes the soil in the south to be acidic, the loss of potassium is large, and the potassium content in the soil is low. Q: Then, is the loss of potassium in acid soils in the south so large that the southern crops need more potassium? A: Yes! Potassium applied to crops in the South is generally effective. Tropical and subtropical plants grow fast, and potassium is taken away more than return. For example, in the 1950s, rubber from Hainan Province was affected by potassium deficiency and rice leaf spot disease occurred in the 1960s. Bananas are typical potassium-demanding crops. The potassium that they carry when harvesting is 3 to 4 times that of nitrogen. The above reasons make the application of potash fertilizer in southern acid soils good. Expert tips â— Acidic soils in the south have low potassium content and generally lack potassium. â— The application of potash fertilizer to different crops in the south is effective. (The expert in solving this problem is Professor Cao Yiping, College of Resources and Environment, China Agricultural University) Rotary Cultivator For Low Sized Gearbox Rotary Tiller Cultivator,New Rotary Tiller,Agriculture Rotary Cultivator,Rotary Cultivator Tiller Shandong Dahua Machinery Co.,Ltd , https://www.agrodahua.com