The yield of qualified seedlings of Platycladus orientalis with single application of potassium increased by 12% compared with the control(cheap 7 gallon plant pots), the qualified seedlings with single application of phosphorus increased by 26%, the qualified seedlings with single application of nitrogen increased by 77%(6.35cm square grow pots), and the seedlings Quality indicators (height of seedlings, ground diameter, dry matter weight, etc.) are the highest.
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Different tree species have different requirements for nitrogen, phosphorus, and potassium(1 gallon nursery pots supplier). Conifer and broad-leaved tree seedlings generally absorb ammonia the most, followed by potassium, and phosphorus the least. But conifer seedlings are more sensitive to nitrogen and phosphorus, especially to phosphorus(half gallon nursery pots wholesale). Tree species with rhizobia, such as Robinia pseudoacacia and Hippophae rhamnoides, can extract ammonia from the atmosphere.
(cheap plastic garden pots wholesale suppliers belgium)Therefore, the application amount of nitrogen can be appropriately reduced, and phosphorus should be appropriately increased(2 gallon nursery pots supplier). Phosphorus is more needed in the seedling stage, because phosphorus is beneficial to the propagation of rhizobia. The test results confirmed the above conclusions(cheapest 2 gallon pots). In the southern part of China where there is a lot of precipitation, there is less nitrogen, phosphorus and potassium in the red and yellow fills.
The test proves that when the larch biennial transplanted seedlings (2-1), when the fresh weight of each plant is 60 grams(3 gallon nursery pots supplier), the seedlings per square meter absorb 9.26 grams of nitrogen, 3 grams of phosphorus, and 3.44 grams of potassium; and when the fresh weight of each plant is 120 grams(2 gallon plant container wholesale), each The nitrogen, phosphorus and potassium absorbed by a square meter of seedlings are twice that of the former, the amount of fertilizer is small.
The utilization rate of various fertilizer elements is different(5 gallon nursery pots supplier). The utilization rate of nitrogen fertilizer in inorganic fertilizer is 40%-60%, generally calculated as 5%, potassium fertilizer is 50%, phosphate fertilizer 10%-25%, the utilization rate of compost nitrogen is 20%-30%, phosphorus 10%~15 %, potassium 0%~45%(8.89cm square grow pots). The first stubble is a recreational area where green manure crops have been planted and has higher fertility than a nursery area.(cheap plastic garden pots wholesale suppliers belgium)
Northern areas with less precipitation have less nitrogen in the soil, but more potassium(7 gallon nursery pots supplier). Fertilizer should be mainly nitrogen and phosphorus. Potassium should be used less or not. All three elements should be more when fertilizing. The stubble fields for cultivating legume seedlings have more nitrogen content than the stubble fields for non-legume trees, and legume trees consume more phosphorus(cheap 3 gallon plant pots). The seedlings are older and need more fertilizer.
(cheap plastic garden pots wholesale suppliers belgium)Seedlings are planted annually with Platycladus orientalis, Pinus tabulaeformis, P. chinensis, Populus sylvestris, and Populus sylvestris(14 gallon nursery pots supplier). Fertilization experiments are conducted on the seedlings. When the density is high, the number of seedlings is large, the amount of fertilization is large, and the density is small(4 gallon nursery pots wholesale). Therefore, in order to improve the quality of seedlings, it is necessary to gradually increase the amount of fertilizer.
On the yellow soil in the North China Plain, use the oriental arborvitae(15 gallon nursery pots supplier), Pinus tabulaeformis, Populus sylvestris and P. alba planting seedlings and poplar planting seedlings to carry out the fertilizer application test. If the two-year-old seedlings grow exponentially more than the one-year-old seedlings: the seedlings are heavier and need to be dispensed(1 gallon plant pots supplier). The soil with organic fertilizers such as spread fertilizer or compost was applied last year.(cheap plastic garden pots wholesale suppliers belgium)
In the experimental Miaogu (yellow-brown soil) of Beijing Forestry University, the qualified seedlings with chlorine and phosphorus increased by 88%(gallon plant pots wholesale), field experiments were carried out with seedlings of Platycladus orientalis, Pinus tabulaeformis, Populus sylvestris and P. alba, and the results confirmed the above conclusions(1.5 gallon nursery pots wholesale). Phosphorus and potassium are less in acid soil filling, and phosphorus and potassium fertilizers should be added.