Causes of premature aging of rice and its countermeasures
The reasons for the premature decline of rice are as follows: Low-lying terrain and poor ventilation cause harmful reducing substances such as hydrogen sulfide, lactic acid, butyric acid, and excessive divalent iron ions to accumulate in the soil, endangering the physiological function of the root system, and reducing the vitality of the root system. When the black roots and even root rot occur, the soil is thin and lacks certain elements, the plough layer is shallow, the fertility is low, and the demand for nutrients from the crop cannot meet the needs of premature aging. Second, the quality of ploughing is not good, especially in areas where the landside and land angles cannot be ploughed every year. Soil compaction, poor permeability, and poor root development; and low fertility and iron, manganese, etc. Leaching, prone to fat loss and premature aging after fertility. In terms of cultivation measures, if the planting density is too large, the individual plants have weak growth, the amount of nitrogen fertilizer is excessive, and the relative supply of phosphorus, potassium, and trace fertilizers is insufficient; if flooded for a long time, no dry aeration is provided; Early withdrawal of water before harvest and late planting and management of late-maturing varieties can all lead to premature aging. The third is the climatic factor. During the filling of rice, when the temperature is low or the number of sunshine hours is too small, the speed of formation and transfer of assimilation materials is greatly slowed down. In September, when the rice filling stage encounters a low temperature of 5-6°C, the cold tolerance Poor varieties or plants with poor root development show discoloration and premature aging. The fourth is variety factors. According to the survey, generally dwarf and early-maturing varieties are prone to premature aging. Because the aerobic tissues of dwarf varieties are usually not as good as high culm varieties; premature aging is related to the length of life of the leaves. The length of life of the leaves is related to the thickness of the leaves. Generally, early-maturing cultivars grow thinner leaves than late-maturing cultivars and have a shorter life span, so premature cultivars are susceptible to premature aging. .
How to prevent premature aging, can take the following specific measures:
1. Improved soils For low-lying lands and saline-alkali lands with high groundwater levels, it is first necessary to build strip fields and drainage works to strengthen and create infiltration conditions. Followed by fertilization to improve the soil, a large number of high-quality farmyard fertilizers, to promote the return of rice straw, leaving sorghum and so on.
2. Reasonable fertilization For the fields where black roots or root rots often occur, fertilizers with sulfate radicals should not be applied or reduced; nitrogen fertilizers should be used to eat less meals and prevent excessive use of base fertilizer and barley fertilizer at one time. Affected to increase panicle and grain fertilizers to achieve live stalk maturation; to increase phosphorus and potash fertilizers, attention should be paid to the supply of potash fertilizers, especially after the booting stage, such as topdressing fertilizers such as small ash containing high potassium, dusty manure, etc.; promote application of compound fertilizers or Long-acting fertilizers with coated membranes and appropriate application of trace fertilizers.
Food Vacuum Sealers,Vacuum Sealer Bags,Vacuum Sealer Machine
Ningbo Shuangtuo International Trade Co., Ltd. , https://www.nbst-sports.com