Method for measuring utilization rate of forest wood phosphate fertilizers
A utilization rate and phosphate fertilizer technology, applied in the field of soil agrochemicals, can solve the problem that the phosphate fertilizer utilization rate cannot be reasonably determined
Active Publication Date: 2014-08-20
RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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[0008] The purpose of the present invention is to provide a method suitable for measuring the utilization rate of phosphorus fertilizer in perennial trees, so as to solve the technical problem that the utilization rate of phosphorus fertilizer in forest tree nutrition diagnosis and fertilization cannot be reasonably determined
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[0018] When the method for determining the utilization rate of forest phosphate fertilizer of the present invention is implemented, first select a 75cm×45cm area in the forest land as the nylon mesh bag embedment area, and collect 5 soil samples of different depths with a soil drill using the plum-shaped dot method in this area. The collection depth is 15-20cm, 20-25cm, 25-30cm, 30-35cm, 35-40cm, 40-45cm soil layer, the soil samples at the same depth are mixed and used as a sample. After the soil samples are dried and ground through a 2mm sieve, Determine the total phosphorus content as the background value of soil phosphorus at different depths. Then use a shovel to dig a hole 46cm long, 15cm wide, and 20cm deep in the area. According to the test requirements, put the sealed nylon mesh bag pre-filled with phosphate fertilizer or a mixture of phosphate fertilizer and other fertilizers into the hole parallel to the ground, layering The original soil is backfilled and compacted, ...
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Abstract
The invention provides a method for measuring the utilization rate of forest wood phosphate fertilizers. According to the method, nylon net bags are selected, phosphate fertilizers or mixtures of the phosphate fertilizers and other fertilizers are charged into the nylon net bags, after the net bags are buried into proper soil layers of forest land soil for a certain time, the residual fertilizers in the nylon net bags and the soil with a proper distance from positions above, below and around the nylon bags are collected, and soil phosphorus analysis is carried out; the residual quantity of the phosphate fertilizers is calculated according to the sum of the residual quantity of the phosphate fertilizers in the nylon net bag and the residual quantity of the phosphate fertilizers in the soil, and in addition, the utilization rate of the phosphate fertilizers is calculated according to a formula. The method can be used for studying the utilization rate of the phosphate fertilizers of the perennial forest wood, and has higher practical values on forest wood nutrition diagnosis and reasonable phosphate fertilizer application to forest land.
Description
Technical field [0001] The invention relates to a method for determining the utilization rate of forest phosphate fertilizer, and belongs to the technical field of soil agrochemistry. Background technique [0002] Phosphorus is one of the indispensable nutrient elements for the growth and development of forest trees. It is a component of important organic compounds in the forest trees. It also participates in the physiological processes in the forest trees in many ways, and has an impact on the growth and development, physiological metabolism, yield and quality of the trees. Plays an important role. The scientific application of phosphate fertilizer is one of the important measures to ensure the rapid growth and high yield of forest trees, and it is also the basic work of improving the fertility of forest land. The current calculation methods of phosphate fertilizer use efficiency are: 1) Difference method, which uses the nutrient absorbed by plants in the fertilized area minus ...
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IPC IPC(8): G01N33/24G01N1/40
Inventor 吴小平王文斌郭海超罗雪华王大鹏张永发
Owner RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI