Prevention for cold damage:
(1) Seedling stage: At first crop seedling stage, the climate is still cold, therefore it is necessary to prevent cold damage. Generally, seedlings nurseries will cover with a layer of non-woven fabric or transparent plastic film on the seedlings to maintain the temperature.
(2) Transplantation stage: Cold prevention work is irrigating the fields with water. Keeping deep water flowing in the field can prevent cold damage or frost damage to leaves by utilizing the high specific heat and temperature release of water in the field. After the temperature rises, the water in the field can be drained to accelerate drainage.
(3) Heading stage:
Mid-late maturing rice varieties should be adjusted according to local farming practices and should not be transplanted too early to avoid the risk of cold damage during the booting stage due to abnormal weather conditions. Applying high nitrogen fertilizer, rice plants are more sensitive to low temperature. Phosphorus fertilizers can be applied appropriately to enhance the resistance to low temperatures.
Early maturing rice varieties should be planted slightly later at about the end of February to ensure safety.
(4) Late reproductive stage: During the period from the panicle differentiation to the heading stage, it is more sensitive to low temperatures. If there is a low temperature forecast, the depth of irrigation water in field can be increased. Drain the water when the weather is warmer to reduce the cold damage. For the second crop, it should be transplanted and finished by early August to reduce the risk of encountering low temperatures in the late reproductive stage.
Low temperature will reduce the photosynthesis of crop, decrease the absorption of nutrients by the root system and affect the transportation of nutrients. Sometimes, farmers eager for better yield may increase the use amount of fertilizer. However, excessive fertilizers will lead to excessive accumulation of nutrients in the soil, causing crop fertilizer damage. In case of low temperature, the first thing to do is to take measures to keep warm. If additional fertilization is needed, it is recommended to use foliage fertilization method, which has better absorption effect than root system.
To enhance crop tolerance and improve health, it is recommended to use the following [KW Agriculture] foliar fertilizers products at different growth stage:
Seedling stage:
Root Forte 110 (Special for Rooting and Germination)：
Promote rice tillering, Strengthen root system growth、Improve respiratory and metabolism
Tillering Stage (Late tillering stage)
Si Force 851 (Special for Poaceae, High in Silicon and Calcium)
The higher concentration of silicon and lignin can enhance the toughness of plant cells, help plants to enhance the resistance and lodging resistance, and also increase yield. Furthermore, Si Force 851 can be used with acidic pesticides without causing precipitation antagonism. (The only one in Taiwan).
Booting Stage (When the panicle starts to develop)
Ca Strong 801(Special for Summer and Water Retention)
Promote panicle initiation and improve the tolerance to the environment.
Si Force 851 (Special for Poaceae, High in Silicon and Calcium)
Increase in production and Improve crops lodging. |
