Apple fertilization should reduce nitrogen and potassium

In the past, we applied the ratio of nitrogen, phosphorus and potassium to 2:2:1 or 1:1:1 in the fertilization of Red Fuji Orchard. After more than ten years of production practice, the ratio of nitrogen fertilizer is too much, Red Fuji grows. It is too prosperous, flower buds are difficult to form, and coloring is also poor. At the National Orchard Standardization Management Conference held last year, experts put forward a new perspective on reducing nitrogen and potassium. It is believed that for every 100 kilograms of apple produced, 0.3 kg of pure nitrogen, 0.08 kg of pure phosphorus, and 0.32 kg of pure potassium are required, that is, the potassium requirement is the largest during the growth of apple trees. The total fertilization amount per tree per year is 0.5 kg of pure nitrogen, 0.5 kg of pure phosphorus, and 0.75 kg of pure potassium. And fertilization is carried out in three periods throughout the year.

1. Before germination (mid-March): 45% of total nitrogen fertilizer and 20% of potassium fertilizer.

2. Fruit expansion period (mid-to-late June): 60% of total potassium fertilizer, 10% of phosphate fertilizer, and 15% of nitrogen fertilizer.

3. Before and after fruit harvesting (late September to late October): 90% of the total amount of phosphate fertilizer, 40% of nitrogen fertilizer, 20% of potassium fertilizer and all farmyard manure. For each kilogram of apple produced, 2-3 kg of farmyard manure is required.

Petri Dishes

Sterile Petri Dishes from YongYue medical carries a complete line of contact plates, sterile, square (with a grid) and absorbent pad Petri dishes, cell spreaders and spatulas. Please contact us if you need additional product specifications. Two of our most popular lab dish products are standard petri dish and 3 compartment petri plate.
Sterile Agar Petri Dish
YongYue® petri dishes are offered in a variety of shapes and sizes for your everyday research needs. YongYue® manufactures optically clear plastic petri dish which are precision-molded from biomedical grade polystyrene for Cell Culture. Dishes are packed in heavy-wall polyethylene sleeves to ensure product integrity. YongYue® petri dishes have many applications including cell culture, growing bacteria and growing yeast.
Clear plastic disposable petri dishes of standard depth (15mm). Supplied in sterile packs. Will deform on autoclaving. Triple Vented. Also suitable for the temporary housing of small invertebrates during collection, or for distributing small chemical samples in class.
Diameter: 90mm
Depth: 15mm
Pack of 20

Culture Dish,Petri Dish,Petri Plate,Petri Dish Bacteria,Cell Culture Dish

Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypipette.com