The konjac originated from the underlying vegetation of the Asian tropical rain forest. This habitat gives the konjac's special temperature habits, making the konjac a warm and avoidable high-temperature crop. It is sensitive to temperature changes, and the accumulated temperature directly affects its growth and development. For cultivation and production, the effect of accumulated temperature on the growth of konjac was studied using a cumulative temperature instrument.
Konjac bulbs germinate around 5°C. The temperature for proper sprouting is 20-25°C. Above 45°C or below 0°C, the buds die after about 5 days. Buds grow slowly below 15°C and grow rapidly above 35°C, but they are relatively delicate. The leaves appear curly when they emerge. The konjak leaves grew normally between 20-30°C with the highest chlorophyll content and the best photosynthesis period. Below 15°C, the leaves turn yellow and fall flat. Leaves slightly faded at 35°C and chlorophyll degraded. When the temperature was 40°C for 30 hours, 43°C for 24 hours, 45°C for 2 hours, or 50°C for 14 hours, the tips of the leaves were wilting and there were obvious signs of injury. High temperature damage to konjac leaves manifests itself in changes in leaf cell membranes. In the range of 15-35 °C, the electrolyte leakage rate of konjac leaf cells did not change much. After treatment at 40°C for 24 hours, the cell membrane permeability also showed significant changes. However, after 8 hours treatment at 43°C, the permeability of the leaf's meninges was significantly increased. After 4 hours treatment at 45°C, the permeability was 62.98%, which was 3 times that of the control. This shows that more than 43 °C, konjac leaf cell membrane can easily damage.
When konjac leaves were treated with high temperature at 45°C and 50°C for 0-2 hours, the malondialdehyde content of lipid peroxidation product increased rapidly. Superoxide dismutase activity decreased rapidly. It shows that hyperthermia causes membranous peroxidation, damages the meninges, and destroys the active oxygen clearance system in the body. The optimum temperature of konjac bulb development is 22-30°C. The larger the temperature difference between day and night, the more it can promote the accumulation of dry matter, increase the yield and improve the quality. This shows that. The konjac leaf can tolerate a high temperature of 35-43°C to a certain extent, but under this temperature condition, it is not suitable for the accumulation of konjac bulb stems, which is not conducive to the cultivation of konjac. For example, under the condition of proper shading and moisture supply in Chongqing, konjac can cross the summer season at temperatures of 42°C. However, during the development of bulbs, the temperatures are high and the temperature difference between day and night is small. The growth of konjac has a “pot effectâ€. small. Konjac bulbs are not resistant to low temperatures. Below 0°C, it will cause intracellular water to freeze, destroy the structure of the cells, and cause the whole bulb to lose its viability. For example, in the winter of 2007, the severe ice and snow disasters in South China caused a large loss of species. Therefore, when planting magic in high altitude and high latitude areas, consider the thickness of the frozen soil layer. In areas where the permafrost is thick, konjac can't be exposed to winter ground simply by exposing the bulbs to frozen layers or using other methods of keeping the plants cold.
The optimum development temperature of konjak root system is 20-26°C. Below 5°C and above 35°C, the roots stop growing. In summary, the optimum temperature for konjac growth is 20-25°C and the adaptable temperature is 5-43°C. During the actual growing season of konjac, where the average daily temperature is lower than 12°C or higher than 30°C, it is not suitable to grow konjac. The average temperature in the mouth is 12.5-30°C, which is suitable for the development of konjac production. The average temperature is 17.5-25 °C, the most suitable for planting konjac. Different kinds of konjac Liu temperature conditions are not the same. Sodium konjac, pearl bud konjac and sweet konjac are divided into groups at low altitudes in southern Fujian. They are able to tolerate higher temperatures and are more resistant to heat. White konjac is distributed in the hot and dry valley of the valley of Jinshatin and it is more heat resistant than konjac.
Since the konjac was above 10°C after the dormancy was released, the buds began their internal activities, and buds sprouted and elongated above 15°C. The sum of the accumulated temperature above 10°C after the konjac lifts dormancy is called the active accumulated temperature of the konjac, and the sum of the accumulated temperature above 15°C after the konjac is released from dormancy is the effective accumulated temperature. Konjac is more sensitive to accumulative temperature response. When the accumulated temperature is met, the plants fall down, but the adaptability of different species to accumulated temperature is not exactly the same, and the response is not the same. Such as the white konjac is a species in the Jinsha River Valley, suitable for planting in the mountainous area of ​​about 800 meters above sea level, germinating to the required temperature of the seedlings need to accumulate a temperature of 4863 °C, the effective accumulated temperature is 1658 °C; flower konjac fitness room at an elevation of 800-2500 meters The place is small and long. It requires a cumulative temperature of 4280°C and an effective accumulated temperature of 1089°C.
Konjac bulbs germinate around 5°C. The temperature for proper sprouting is 20-25°C. Above 45°C or below 0°C, the buds die after about 5 days. Buds grow slowly below 15°C and grow rapidly above 35°C, but they are relatively delicate. The leaves appear curly when they emerge. The konjak leaves grew normally between 20-30°C with the highest chlorophyll content and the best photosynthesis period. Below 15°C, the leaves turn yellow and fall flat. Leaves slightly faded at 35°C and chlorophyll degraded. When the temperature was 40°C for 30 hours, 43°C for 24 hours, 45°C for 2 hours, or 50°C for 14 hours, the tips of the leaves were wilting and there were obvious signs of injury. High temperature damage to konjac leaves manifests itself in changes in leaf cell membranes. In the range of 15-35 °C, the electrolyte leakage rate of konjac leaf cells did not change much. After treatment at 40°C for 24 hours, the cell membrane permeability also showed significant changes. However, after 8 hours treatment at 43°C, the permeability of the leaf's meninges was significantly increased. After 4 hours treatment at 45°C, the permeability was 62.98%, which was 3 times that of the control. This shows that more than 43 °C, konjac leaf cell membrane can easily damage.
When konjac leaves were treated with high temperature at 45°C and 50°C for 0-2 hours, the malondialdehyde content of lipid peroxidation product increased rapidly. Superoxide dismutase activity decreased rapidly. It shows that hyperthermia causes membranous peroxidation, damages the meninges, and destroys the active oxygen clearance system in the body. The optimum temperature of konjac bulb development is 22-30°C. The larger the temperature difference between day and night, the more it can promote the accumulation of dry matter, increase the yield and improve the quality. This shows that. The konjac leaf can tolerate a high temperature of 35-43°C to a certain extent, but under this temperature condition, it is not suitable for the accumulation of konjac bulb stems, which is not conducive to the cultivation of konjac. For example, under the condition of proper shading and moisture supply in Chongqing, konjac can cross the summer season at temperatures of 42°C. However, during the development of bulbs, the temperatures are high and the temperature difference between day and night is small. The growth of konjac has a “pot effectâ€. small. Konjac bulbs are not resistant to low temperatures. Below 0°C, it will cause intracellular water to freeze, destroy the structure of the cells, and cause the whole bulb to lose its viability. For example, in the winter of 2007, the severe ice and snow disasters in South China caused a large loss of species. Therefore, when planting magic in high altitude and high latitude areas, consider the thickness of the frozen soil layer. In areas where the permafrost is thick, konjac can't be exposed to winter ground simply by exposing the bulbs to frozen layers or using other methods of keeping the plants cold.
The optimum development temperature of konjak root system is 20-26°C. Below 5°C and above 35°C, the roots stop growing. In summary, the optimum temperature for konjac growth is 20-25°C and the adaptable temperature is 5-43°C. During the actual growing season of konjac, where the average daily temperature is lower than 12°C or higher than 30°C, it is not suitable to grow konjac. The average temperature in the mouth is 12.5-30°C, which is suitable for the development of konjac production. The average temperature is 17.5-25 °C, the most suitable for planting konjac. Different kinds of konjac Liu temperature conditions are not the same. Sodium konjac, pearl bud konjac and sweet konjac are divided into groups at low altitudes in southern Fujian. They are able to tolerate higher temperatures and are more resistant to heat. White konjac is distributed in the hot and dry valley of the valley of Jinshatin and it is more heat resistant than konjac.
Since the konjac was above 10°C after the dormancy was released, the buds began their internal activities, and buds sprouted and elongated above 15°C. The sum of the accumulated temperature above 10°C after the konjac lifts dormancy is called the active accumulated temperature of the konjac, and the sum of the accumulated temperature above 15°C after the konjac is released from dormancy is the effective accumulated temperature. Konjac is more sensitive to accumulative temperature response. When the accumulated temperature is met, the plants fall down, but the adaptability of different species to accumulated temperature is not exactly the same, and the response is not the same. Such as the white konjac is a species in the Jinsha River Valley, suitable for planting in the mountainous area of ​​about 800 meters above sea level, germinating to the required temperature of the seedlings need to accumulate a temperature of 4863 °C, the effective accumulated temperature is 1658 °C; flower konjac fitness room at an elevation of 800-2500 meters The place is small and long. It requires a cumulative temperature of 4280°C and an effective accumulated temperature of 1089°C.
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