Reasons for rice lodging and countermeasures
Rice lodging is one of the most troublesome problems for grain growers. Once the rice falls, it will be difficult to harvest, the yield will drop, and the quality will be greatly reduced. So what is the cause of rice lodging? How to prevent from the root cause?
Rice lodging generally has two roots lodging and stem lodging. The general root lodging occurs after the wax maturity period. Because the field is not settled, the field retains water for a long time, the soil is rotted, the root system is poorly developed, the roots are shallow, and the root support is poor. Top-heavy, slightly affected by wind and rain, it is easy to fall; stem lodging usually occurs after heading, due to improper fertilization or high density, resulting in soft stems, can not afford the upper weight and cause lodging.
First, the reasons for the lodging of rice: First, the field is not good, the field maintains the water layer for a long time, the airway in the rice stem is swollen, the cell wall is thin, the cell spacing is large, the tissue is soft and loose, the root system is poorly developed, the number of hair roots is small, and the root system is The distribution is shallow and the roots are poor. The second is improper fertilization. The application of panicle fertilizer is too early and too heavy, resulting in the elongation of the first and second nodes of the base. The population is too large, the stems are thinner, the stem and sheath storage materials are small, and the supporting force is poor.
Second, measures to prevent rice lodging: First, scientific fertilization. The application time of the panicle fertilizer should be accurate and the quantity should be appropriate. This is beneficial to the stalk enrichment and control the elongation of the base internodes, thus enhancing the plant's resistance to lodging. The second is to adhere to scientific irrigation. After the rice is transplanted, the water is soaked in water and the water is shallow. A good soil field, when the 667 square meters (1 mu) of stems reached 90% of the expected number of spikes began to lay the field. For fields with poor soil quality, you can wait until the seedlings are enough to put the fields on the ground, and then fill the water when the water is hard. Before the water is poured, the water is not seen in the water, that is, after the water is poured, it is allowed to dry for 1 to 2 days and then the second water is poured. However, shallow water layers must be maintained in the field of rice tillering and heading and flowering. The above irrigation method is beneficial to the exchange of water and gas in the root layer, improves the root growth environment, promotes the growth of new roots and the roots under the roots, enlarges the root group, enhances the support of the roots, and improves the lodging resistance. The third is to adhere to disease prevention and treatment of insects. In particular, for sheath blight and rice planthopper, it is necessary to control the disease according to the condition of the pests and diseases, so as to prevent the rice plants from lodging after the pests and diseases are harmed. The fourth is to increase the application of silicon fertilizer. In the early stage of rice jointing, 10 kg of silicon fertilizer is applied per 667 square meters to enhance the stalk thickness and improve the lodging resistance.
Third, the remediation of rice after lodging: the rice should be remedied in time after lodging, the main measures are four:
First, timely ditch drainage and light field. This has a positive effect on slowing the spread of sheath blight, prolonging the functional period of the leaves, promoting the continued filling of the grains, preventing the germination of the ears and the rot of the stems.
The second is to spray potassium dihydrogen phosphate. 200 g of potassium dihydrogen phosphate per 667 m2, sprayed with 10 kg of foliar water.
The third is to use 5% Jinggangmycin 100 grams, 10 kg of water spray to prevent sheath blight. Jinggangmycin and potassium dihydrogen phosphate can be mixed with medicine and fertilizer.
Fourth, it is not appropriate to support the rice after lodging. Remember to do not support the rice after lodging, because the fallen rice plants generally fall back after the trend, the rice ear, the ear stem section and the inverted leaf, the inverted two leaves are basically exposed on the surface, 3 to 5 days after lodging Due to the automatic regulation of the rice plant, the leaves and cobs are automatically lifted, especially in the fields where the lodging is not too serious, and the rice plants are more capable of self-regulation. However, after the lodging, the rice can be plucked, but the natural distribution of the rice ear, the ear stem and the leaf will be artificially destroyed, and the mechanical damage will be aggravated, resulting in more serious lodging loss.
The above is the reason and remedial measures for rice lodging. When you are fine, you can take a look and learn more. You can continue to pay attention to Hui Nong Network!
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