Scientific fertilization is one of the important measures to achieve high quality and high yield of rice. However, rice fertilization is a technically strong work. In practice, it must be flexibly controlled by variety characteristics, soil fertility, climatic factors and cultivation conditions. As you know, the demand for fertilizer in rice is manifested in the nutrition period, the nutrient critical period and the maximum nutrient efficiency period. If the growth period of early rice is short, the amount of fertilizer needed is relatively small, and fertilization should be concentrated earlier. Mid-season and late-season rice have a longer growth period, require a large amount of fertilizer, and have a large absorption intensity. The number of top dressings should be increased to increase the proportion of top dressing. The nutrient critical period of nitrogen, phosphorus and fertilizer in rice generally occurs in the three-leaf stage. Sometimes the nutrient critical period of nitrogen and potassium also occurs in the differentiation of young panicles and the formation of young panicles. The maximum nutrient efficiency of rice occurs in the long ear stage, which is the most vigorous stage of vegetative growth and reproductive growth, and also a critical period for fertilizer. According to the study, for every 100 kilograms of rice produced, about 1.6-2.5 kg of nitrogen, 0.8-1.2 kg of phosphorus and 2.1-3.0 kg of potassium are required to be absorbed from the soil. According to the above characteristics of rice fertilizer, the production should be based on the application of the base fertilizer, and pay attention to the application of "three fertilizers", namely, split fertilizer, panicle fertilizer, and granular fertilizer.
First, timely application of fertilizer. The top dressing of rice from transplanting to young ears begins to differentiate. The tillering fertilizer requires early application time and sufficient quantity. Generally, the amount of fertilizer is 50-60% of the total amount of topdressing. Because the tillering period is the first peak period of nitrogen nutrition in rice life, and because the temperature, water temperature and soil temperature in the early stage of rice are low, the release of nutrients is slow, and the amount of topdressing is too small to meet the needs of rice for nutrients. Only when it is applied in time is beneficial to early rice tillering, more tillering, lowering the tillering position, and creating conditions for the length of the panicle and the grain weight. The tiller fertilizer is applied 7-10 days after rice planting, and 5-7 kg of urea is applied per acre. If the bottom fertilizer is insufficient, it can be appropriately applied, but it is forbidden to over-dressing the fertilizer to prevent excessive growth in the middle and late stages.
Second, skillfully apply panicle fertilizer. Rice is differentiated from young ears to the top dressing before heading. This period is the second peak period of nitrogen absorption. Scientific application of ear fertilizer can not only play a role in maintaining flowers and grains, but also promoting the effect of large grains and large grains, and can prevent the occurrence of greed and lodging. There are several points to be technically made. First, the field is good, the bottom is fat, and there are many branches. The second is that the morning leaves do not hang dew, the noon leaves are straight, the leaves are pale yellow, and the third is cloudy and rainy. Shi, rush to apply on a sunny day. The application time is round stalk period of rice, applying 3-4 kg of urea per acre, and spraying evenly on the leaf surface with 0.2-0.3% potassium dihydrogen phosphate solution per acre of 50 kg.
Third, the use of grain fertilizer as appropriate. The top dressing after rice heading is called “grain fertilizer†or “strong seed fertilizerâ€. The application of granular fertilizer as appropriate can effectively extend the functional period of the leaf, prevent premature aging, and increase the weight of the grain. However, it should be noted that the seedlings are not yellow, the rainy days are not applied, and the diseased fields are not applied. It is necessary to spray 1% urea solution on a sunny afternoon, or 1:500 times Huimanfeng active liquid fertilizer, 50 kg spray per acre. For paddy fields that have developed sheath blight and rice warm disease, pesticides such as sclerotial nucleus, different rice glutinous rice, stalk net, agricultural anti-120, and bacteriostatic should be sprayed alternately to prevent and control in time.
Diaphragm liquid pumps are equipped with high-quality brushless motors, long life, low interference, maintenance-free, good corrosion resistance, wide-ranging applications, and pollution-free transmission.
Our company has complete product models and different application ranges. There are diaphragm pumps, diaphragm pumps, peristaltic pumps, vacuum pumps, etc., which greatly reduce your laboratory procurement costs.
Micro diaphragm liquid pump,diaphragm liquid pump,Laboratory diaphragm pump,Small diaphragm liquid pump
Changzhou Yuanwang Fluid Technology Co., Ltd. , https://www.ywfluid.com