Chemical fertilizer, also known as inorganic fertilizer or mineral fertilizer, refers to chemical substances that directly or indirectly provide plant nutrients, promote growth, increase yield and improve quality. Chemical fertilizer plays a very important role in rice production. Rational use of chemical fertilizers can improve the yield and quality of rice and the commodity value of rice.
Nitrogen, phosphate fertilizer or combination of nitrogen, phosphorus and potassium. Under high-yield cultivation conditions, rice is prone to bacterial wilt, lodging and rice blast, and the empty chaff rate increases. Therefore, we should adhere to the coordinated application of nitrogen, phosphorus and potassium in fertilization.
Rational fertilization and formula fertilization. Fertilization amount should be appropriate and the ratio should be reasonable for high yield cultivation. According to the plots with different fertility, different fertilization rates are determined to achieve formula fertilization and ensure high yield.
Precautions:
(1) Apply sufficient base fertilizer. Organic fertilizer has slow decomposition, low utilization rate, long validity period and complete nutrients, so it is better to be used as base fertilizer. However, due to the low temperature and slow release of soil nutrients in early spring in rice areas, 30% ~ 50% of total available nitrogen fertilizer can be used as base fertilizer to promote the early growth and rapid development of seedlings in high-yield fields. Both phosphate fertilizer and potash fertilizer are used as base fertilizers, and some of them can also be used at jointing stage.
(2) Apply tillering fertilizer early. Early application of tillering fertilizer after rice turning green can promote the occurrence of low tillering and increase the number of panicles. Tillering fertilizer is applied twice, once after turning green, the dosage is about 25% of the total nitrogen fertilizer, aiming at promoting tillering; The other time, it was used as a regulating fertilizer at the peak tillering stage, and the dosage was about 10%. The purpose is to ensure the orderly growth of the whole field and play the role of tillering and ear formation. The late adjustment of fertilizer application depends mainly on population growth.
(3) Clever application of ear fertilizer. Ear fertilizer not only has a great influence on rice growth and yield formation in quantity, but also the application time is very important. The application of panicle fertilizer at leaf age index of 9 1 (60% inverted leaves protruding) can promote the growth of flag leaves. When the high-yield population is flourishing, applying ear fertilizer at the age of 96 (before meiosis) can keep flowers.
(4) Apply granular fertilizer as appropriate. Applying grain fertilizer in the late stage of rice can improve grain maturity and increase 1000-grain weight. Grain fertilizer can be applied according to the population growth at the heading stage of rice, but the application amount and fertilization method should be controlled well.
This is basically professional knowledge. What if you don't copy?
Rice fertilization methods and dosage, rice fertilization methods are washing and spraying, but I use spraying more here because I use good fertilizer. When spraying the molar water-soluble fertilizer introduced by my friend, I added 8 synergists, not to mention spraying it on the leaves for a long time. The absorption in a few seconds mentioned above is really good.
What is the amount and method of fertilization for rice? It depends on where the rice is planted. Generally, fertilizers of big brands such as Red Square are used, and the effect is better. The amount and method of fertilization can be consulted by the agrochemical service experts of the manufacturer.
Three-control fertilization method for rice "Three-control" fertilization technology is an efficient and safe fertilization and supporting technical system with the characteristics of fertilizer control, seedling control and insect control (referred to as "three-control"), which is established in view of the outstanding problems such as large waste of chemical fertilizer, high pesticide consumption and heavy environmental pollution in rice production.
At present, the south uses more, while the north uses less.
Fertilization methods of rice in northeast China, fertilization problems in rice fields, does rice need to be fertilized in the presence of water? What are the more advanced fertilization methods (with water)? Fertilization of rice needs to be carried out in the presence of water, because fertilizer is soluble in water, which is more easily absorbed by crops and has a higher absorption and utilization rate. At present, there is no more advanced fertilization method for rice in China, and only traditional artificial fertilization can be adopted.
Cultivation and management of rice after transplanting, fertilization by stages, fertilization every few days, and fertilization amount;
Transplanted rice seedlings
Carefully and orderly put the seedlings in the rice field. The traditional transplanting method will mark the rice field with seedling rope, seedling label or transplanting wheel. When transplanting rice by hand, you will wear a seedling separator on your left thumb to help farmers divide the seedlings and put them in the soil. The climate of transplanting rice seedlings is very important, such as heavy rain will damage the seedlings. There are many rice transplanters used in modern times, but in paddy fields with large fluctuations and non-square shapes, manual rice transplanting is still needed. Generally, seedlings will show a north-south trend. It is also more convenient to throw seedlings.
Weeding and killing insects
When the seedlings grow, we should always take care of them, uproot weeds, and sometimes use pesticides to get rid of pests (such as snails).
Fertilize soil or land
When the seedlings rise and grow the first rice stalk, it is called tillering stage. During this period, fertilization is often needed to make rice seedlings grow healthily and promote the fullness and quantity of rice quality in the future.
Irrigation and drainage
Rice is more dependent on this procedure. Upland rice is a upland field, and the process of irrigation and drainage is different. However, it is generally necessary to strengthen irrigation after transplanting, when young panicles are formed, and at the heading and flowering stage.
Fertilization method and dosage How to master fertilization amount depends on fertilization method. Take Fulinmen water-soluble fertilizer as an example, it needs to be diluted 300-500 times with water for washing, 500-800 times with water for wetting and drip irrigation, and 800- 1000 times with water for foliar spraying. This is a scientific and instructive usage. Only by adopting scientific fertilization methods can we make better use of fertilizers and improve their utilization rate.
What is the fertilization method of Hutou Mountain Shadow Bonsai? Tai Ji Chuan in Hutou Mountain generally does not need fertilization. When changing pots every year, a small amount of bone marrow powder can be put at the bottom of pots as base fertilizer.
Tai Ji Chuan in Hutou Mountain should keep water and fertilizer, otherwise it will easily lead to rotten roots, or it will be deformed in vain, and it will become "ancestral" and become columnar, losing its ornamental value. However, if it is found that the growth is weak at ordinary times, available nitrogen fertilizer and potassium fertilizer can be added, and 5g Henry water-soluble fertilizer can be added to each plant. Remember not to flood the fertilizer.
Hutou Mountain is fond of sunshine, drought-tolerant, barren and shade-tolerant. Not suitable for too wet soil and weak light environment.
Potted plants should choose sandy soil with ventilation, good drainage and rich calcium. Watering 1 time every 3-5 days to keep the soil slightly dry can make the plants grow slowly, coarsely and beautifully.
What is the fertilization method of potted Taxus chinensis? We think that we should pay special attention to five aspects: light, ventilation, moisture, fertilization and pest control.
1. mairei, a variety of Taxus chinensis var. China, likes shading at the young tree stage, but is not suitable for strong light, so it is suitable for growth and development under indoor scattered light conditions. It is best to have a proper amount of light every day or put it indoors near the window.
Second, Taxus mairei bonsai grows better in places with good ventilation conditions.
Third, watering is the most basic and important link in the daily maintenance and management of Taxus bonsai. But the more water you water, the better. The general principle is "if you don't do it, you will fall completely." The standard of seepage is that water flows out from the drainage hole at the bottom of the basin.
When do you need watering? It can be judged from several aspects: first, the leaves were quite shiny. If they start to get dull or even a little soft, they should be watered. If the leaves droop, it means that the soil in the basin is very dry. Second, tap the basin a few times with your hand, and you can judge the dryness and wetness from the sound. An empty sound means that the soil is dry, and a stuffy sound means that the soil is still wet. Third, judging from the basin soil. The most direct way to judge is to insert your finger into the soil for 2 to 3 centimeters. When the soil feels dry and hard, you need to water it. When it feels wet, you don't need to water it.
There are two ways to water: one is to water the roots, and the other is to spray water on the leaves. All plants need to be watered. Taxus bonsai also needs regular foliar spraying.
Finally, we should pay attention to the following points when watering the Taxus bonsai: 1. Water with low salinity should be used for watering. 2. Alkaline water should not be used for watering. Taxus likes a slightly acidic medium that is close to neutral. The water quality in the north is alkaline, so it can be adjusted by adding ferrous sulfate to the water. Tea is alkaline and cannot be poured into the basin. 3, must pay attention to the water temperature and soil temperature difference is not too big. When it is hot in summer, water it in the morning and evening, not in the hot sun at noon; When it is cold in winter, water should not be ignored, and it should be watered when the sun is shining at noon. 4. When watering, it is best to slowly pour loose soil. This not only breaks the soil surface hardening and increases the air permeability, but also effectively increases the water storage capacity of the substrate in the basin.
Four, yew bonsai shed is generally not short of fertilizer. If it is found that there are some individuals with slightly poor growth, small leaves and yellow leaves, nitrogen, phosphorus and potassium compound fertilizer can be applied at one time to expand the hole. During indoor maintenance, foliar fertilizer (potassium dihydrogen phosphate) can be sprayed once every month or so. It is recommended to apply compound fertilizer after 6 months.
Five, Taxus bonsai is generally less pests and diseases. If individual leaf-eating pests are found, they can be killed manually, and check whether there are eggs on the back and branches of leaves in time to eliminate future troubles. Dead leaves and fallen leaves can also be mixed with carbendazim at the concentration of 1: 1000 and sprayed on the leaves.