How to judge the maturity of organic matrix and compost

June 11, 2024

Under the new situation in which new districts and regions are advocating global environmental protection agriculture, industries that use various industrial and agricultural organic solid wastes to produce horticultural crop cultivation substrates or compost organic fertilizers are very popular in China. Due to the lack of scientifically unified product quality standards and processes in the country, the quality of related products circulated on the market varies greatly. Frequently, due to the use of inadequately decomposed matrix or organic fertilizers, the breeding or cultivation of fruits and vegetables, flowers and trees, and turfgrasses are often encountered. All kinds of growth disorders, such as inhibiting germination, "burning roots", stiff seedlings, yellowing, weak growth, and even dead plants. The main reason is that fermentation has not been fully decomposed. As raw materials, straws and animal manures, intermediate products such as phenolic acids and ammonia in the process of decomposition and decomposition, become crop germination and growth inhibitory substances that remain in the product, and the above-mentioned growth retardation occurs after use, making it difficult to produce. Recovered losses.

In order to avoid unnecessary losses, it is recommended that when purchasing products, practitioners should first sample and identify different batches of products according to several simple and practical ripeness identification methods described below. Only after reaching the safety standards can they be assured of their use. Several identification methods are summarized as follows: plastic bag method (composting mainly based on livestock and poultry excreta)

The compost products mainly composed of livestock and poultry excreta are sealed in plastic bags. If the plastic bag does not bulge, it can be concluded that the compost product has decomposed (due to the unfermented fertilizer producing gas).

Germination test method 5g of air-dried products into a 200mL beaker, add warm water at 60°C 100mL soak 3h after filtration, the filtrate will be taken 10mL, poured into a petri dish covered with two layers of filter paper, row 100 kinds of cabbage, radish, Cucumber or tomato seeds are subjected to a germination test. A separate control was used. Distilled water was used in the petri dish. The seed and germination test methods were the same as above. The germination rate was generally considered to be more than 90% of the control area, indicating that the product had been decomposed and qualified. This method is particularly suitable for the identification of products containing lignocellulosic material.

The law prepares several cups and cups and black cloth. Put crumbled products in the cup, and then put the clams into it. Cover the cuvette with a black cloth. If the clams sneak into the inside of the product, it means that it is cooked. If you climb on the pile and refuse to dive into the pile, it indicates that the product is not fully cooked. There is phenol or ammonia residue.

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