Application methods and precautions of rare earth elements in grape cultivation
The rare earth element (re) refers to 15 kinds of heavy metal elements such as yttrium, ytterbium, ytterbium, and lanthanum, which have very similar chemical properties in the lanthanides of the periodic table of elements. They have been widely used in fruit trees in recent years. Commercial rare earth micro-fertilizer is called agricultural probiotics, referred to as "farmer music". Spraying rare earth elements on grapes can increase fruit setting rate, increase leaf area, increase chlorophyll content, increase photosynthetic capacity, and enhance accumulation of dry matter, thereby effectively increasing yield and enhancing quality, and can also effectively prevent fruit cracking and promotion. The fruit matures earlier. The application method of rare earth elements on grapes is: before the grape is blooming, full flowering period and fruit expansion period, each spray 500-1000 mg/kg of rare earth elements. Practice has shown that after such processing, the output can increase by 10% to 31.8%, sugar content can increase by 1 percentage point, and mature period can be 5 to 7 days earlier. For some easily cracked varieties such as Dinna, Rizamat, Jingyou, etc., spraying 500 mg/kg of rare earth element twice in the fruit enlargement period can promote the skin thickening, and accordingly reduce cracking. The use of rare earth fertilizer should pay attention to: 1 rare earth fertilizer can only be dissolved in slightly acidic solution, in the hard water and alkaline solution is easy to form a precipitate and can not be dissolved, so the preparation should be used vinegar to adjust the water slightly acidic ( P5-6), and then add rare earth micro-fertilizer, fully stirred, until it is completely dissolved and then formulated into the required concentration, ready for use. 2Rare earth fertilizers should be sprayed on sunny days at 9-10 am and after 16 pm. 3 The foliar application of rare earth microelement fertilizer concentration shall not exceed 1%, otherwise it will easily cause phytotoxicity. 4 The effect of rare earth micro-fertilizers on the vineyards planted on sandy and calcareous soils is obvious, but there is no obvious effect on the application of acid soils. Reflective Shopping Bag,Printable Reflective Bag,Reflective Strip Shopping Bag,Highly Visible Shopping Bag RFX+CARE Manufacturing Co.,Ltd. , https://www.rk-rfxcare.com