Pingshan white konjac, produced in pingshan county, Sichuan Province, is a functional food. Pingshan county has less sunshine, abundant rainfall and high humidity. More than 30 rivers and streams crisscross the county, and the valleys crisscross, with large vertical height difference, which creates a unique climate in the Jinsha River Valley and has the best regional conditions for planting white konjac. It was once rated as "White Konjac Industrialization Pilot Construction County" and "National Konjac Industry Production Key Base County". Pingshan white konjac is of excellent quality, and its most remarkable effect is to clear fat and lower blood sugar, especially to lose weight.
Unique terrain
Pingshan county is located in the south of Sichuan Province, on the north bank of the lower Jinsha River. The Minjiang River passes through Xinfa Township in the northeast with an area of 1, 536,5438+0 square kilometers and an average elevation of 650 meters. The overall terrain of the county is inclined from northwest to southeast, with overlapping mountains, staggered hills and gullies, deep rivers, steep mountains and steep slopes and broken terrain. The valley is an asymmetric V-shaped narrow valley, which belongs to continental monsoon humid climate. There are four types of landforms left in Xiaoliang Mountain range: shallow-cut monoclinic low mountain, single-sided mountain, middle-cut Zhongshan Canyon and hills. Due to the influence of the climate in Jinsha River basin, there are many clouds in the planting areas within the protection range designated by the county government, and the forest coverage rate reaches 53%. There is a great difference in climate between mountains. There are many deciduous, shrub and herb communities under the forest, and there are deep and fertile humus layers. The unique landform forms the ecological environment of "mountain fog", which makes Pingshan white konjac rich in content, vitamins and alkaloids, and ensures the excellent quality of Pingshan white konjac.
(2) Unique environmental climate
The vertical distribution of climate zone in Pingshan County is obvious. The valleys and foothills in the territory are subtropical, the mountains and mountains are warm temperate and middle temperate, and the top of the mountain is sub-frigid. The annual average temperature 14.9℃, annual average relative humidity 70%, annual average precipitation 1000mm, and soil water storage capacity above 30%. There are more clouds and less sunshine in the planting area. Abundant water resources, abundant precipitation and excellent water storage function of forests naturally regulate the climate of planting areas. The air in the planting area is humid, with dense streams and lush plants. This climate with abundant rainfall, fog and little sunshine provides a paradise-like ecological environment and superior natural conditions for Pingshan white konjac, which is conducive to the growth and development of roots, the after-ripening of tubers and the harvesting and processing of Pingshan white konjac.
(3) Unique soil environment
Pingshan County is a mountainous area with an altitude of 500 meters to 1500 meters, which is affected by abundant rainfall, abundant vegetation and numerous wild animals. A large number of fallen leaves, animal remains and excrement are buried in the soil as mud, and the effective soil layer is deep, forming mountain yellow soil and a small amount of purple soil. The soil is rich in natural organic fertilizer and beneficial mineral elements, which can fully meet the demand for mineral elements in different growth stages of Pingshan white konjac. The quality characteristics of Pingshan white konjac are rich in vitamins, amino acids and mineral elements such as potassium and phosphorus.
The main component of konjac is a soluble dietary fiber called KGM, and the amount of glucomannan is the only index to determine the weight loss effect of konjac. The glucomannan content of white konjac is the highest in the whole konjac family, with an average of 59.3%, which is several times that of common sweet konjac. In addition, white konjac also contains more vitamins, alkaloids, amino acids in crude protein and trace elements necessary for human body than other konjac varieties. At the same time, sugar, starch and other components are relatively reduced, which also forms the most reasonable efficacy ratio among all konjac varieties.
The unique valley climate in Jinsha River basin is suitable for planting white konjac. Pingshan white konjac planting area belongs to Jinsha River basin. According to the analysis of glucomannan content of Pingshan white konjac for many years, the average glucomannan content of Pingshan white konjac can reach 67.8%, which is a high-quality product in Jinsha River basin.
The origin of white konjac in Pingshan covers two towns in pingshan county 12, including Jinping Town, furong town, Xincheng Town, Zhongdu Town, Longhua Town, Shulou Town, Xin 'an Town, Pingbian Yi Township, Qingping Yi Township, Xiaxi Township, Longxi Township and Taiping Township.
Letter of Pingshan County People's Government on Delineating the Protection Scope of Pingshan White Amorphophallus Geographical Indications, 1 12 [2065438].
Sichuan Province (region) local standard: DB 511500/T55-2015 "Technical Specification for Processing of Geographical Indication Product Pingshan White Amorphophallus" (draft).