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Controlled-release fertilizer bag specially for trees

A controlled-release fertilizer and fertilizer bag technology, which is applied in the direction of fertilizer mixture, application, fertilization methods, etc., can solve the problems that the release rate is difficult to control artificially, the price of polyolefin-coated urea is high, and the limitation of large-scale application

Inactive Publication Date: 2004-11-24
淮安市农业科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Some of the existing long-acting fertilizers, such as urea-formaldehyde, sulfur-coated urea, and ammonium magnesium phosphate, are difficult to control. Some, such as polyolefin-coated urea in Japan, are too expensive, and their large-scale application is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Mix 200 g of urea, 100 g of monoammonium phosphate, and 100 g of potassium sulfate, get 300 g and distribute them in 3 plastic bags, each bag is 100 g, and use a needle with a diameter of 1 mm to pierce 5, 10, and 15 holes respectively, namely To form controlled-release long-acting fertilizer bags with different release rates, take 4 plastic tubes with a diameter of 10cm and a height of 30cm, tie the lower opening with a nylon mesh, first spread wet fine sand with a height of 10cm, and put in controlled-release fertilizers with different release rates Put 100g of unpacked mixed fertilizer directly in one bag for each tube as a control, and then spread fine sand at a height of 10cm. After washing three times, the filtrate was collected, and nitrogen was measured by Kjeldahl method, phosphorus was measured by vanadium yellow colorimetry and potassium was measured by flame photometry.

[0008] Measurement time

[0009] If urea, ammonium phosphate, pota...

Embodiment 2

[0010] Embodiment 2: with commercially available Nanhua Company Red Triangle brand 45% granular compound fertilizer, pack thickness 0.01mm by the amount of every bag 100g, long 12cm, in the polyvinyl chloride plastic bag of wide 8cm, use on the plastic bag 13 holes were evenly punched with a 1mm needle to make controlled-release long-acting fertilizer bags. Six 3-year-old commercial poplars with the same growth were selected and divided into two groups. One group applied 4 bags of controlled-release fertilizer to each plant, and the other group was controlled. 4 holes of the same variety and the same amount of ordinary fertilizer, the fertilization position is 50cm away from the trunk, one hole each in the east, west, south, and north, with a depth of 20cm, the date of fertilization: March 11, measure the height of the tree and 1.3 meters above the ground when fertilizing Diameter, side branch leaves were taken on May 25th and September 15th to measure nitrogen content, and tre...

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Abstract

The present invention discloses controlled-release fertilizer bag specially for tree. Soluble quick-acting chemical fertilizer is packed into impermeable bag of polymer film and the bag has holes made in certain amount of size and number to regulate the fertilizer releasing speed. The fertilizer may be one single fertilizer or mixed nutritive fertilizer and may also be composite multifunctional fertilizer with mixed plant growth regulator and / or pesticide. The present invention is simple and practicable, and the bag is made preferably with degradable film to avoid pollution to soil.

Description

technical field [0001] The invention relates to a fertilization bag, in particular to a controlled-release fertilizer bag specially used for trees. Background technique [0002] Some of the existing long-acting fertilizers, such as urea formaldehyde, thiocoated urea, and ammonium magnesium phosphate, are difficult to control the release rate, and some, such as polyolefin-coated urea in Japan, are too expensive, and their large-scale application is limited. Contents of the invention [0003] The purpose of the present invention is to provide a special controlled-release fertilizer bag for trees, which can realize controlled-release and long-acting fertilizer and reduce agricultural costs. [0004] The technical solution of the present invention is: pack the soluble quick-acting chemical fertilizer into an impermeable bag to make a fertilizer bag, the fertilizer bag is a polymer film bag, and the fertilizer is wrapped in the bag, and the number and size of the holes punc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00A01G29/00C05G3/00
Inventor 张山泉陈川庄春纪凤高
Owner 淮安市农业科学研究院
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