Cadmium-polluted soil repair agent containing phosphate and application thereof
A technology of soil remediation agent and phosphate, which is applied in the field of agricultural compositions and plant planting, and can solve the problems of high cost and the use of agricultural compositions
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Embodiment 1
[0060] Embodiment 1 The preparation of the soil remediation agent containing chitosan and lentinan
[0061] Chitosan (Chengdu Qimei Biological Technology Co., Ltd.) and lentinan contained in the soil remediation agent of the present invention can all adopt commercially available products, but preferably the lentinan with a larger amount of consumption can be prepared according to the following method, so that its cost is lower Low, more suitable for promotion and application.
[0062] (1) Preparation of Lentinan
[0063]Crush the fruiting bodies of shiitake mushrooms, pass through a 30-mesh sieve, take 200kg of powder that can pass through the sieve (the particles that cannot pass the sieve will be returned to the pulverizer for crushing), add 1000L of water and soak at 80°C for 1 hour, stir during the period, and then filter to retain the clear liquid; Add 1000L water to soak for 1 hour at 80°C for the first soaking residue, stir during the period, then filter to reta...
Embodiment 2
[0068] Example 2 Research on soil remediation agent containing chitosan and lentinan on soil heavy metal remediation and plant quality improvement
[0069] The Soil and Fertilizer Research Institute of Sichuan Academy of Agricultural Sciences was entrusted to conduct a field test in Pujiang County in a tea garden planted with the No. 9 variety of Chuancha. At the beginning of the test, the following soil repair agent or control was directly applied to the randomly grouped plots, and the soil was turned over. The rest refers to the conventional management of tea gardens:
[0070] A, negative control group: negative control, 90kg / mu;
[0071] B, positive control group 1: positive control group 1, 90kg / mu;
[0072] C, positive control group 2: positive control group 2, 90kg / mu;
[0073] D, low-dose experimental group: the soil remediation agent of embodiment 1, 22.5kg / mu;
[0074] E, middle dose experimental group: the soil remediation agent of embodiment 1, 45kg / mu;
...
Embodiment 3
[0086] Embodiment 3 Preparation and application of phosphate-containing soil remediation agent
[0087] Take 10kg of sodium dihydrogen phosphate and 20kg of activated carbon (acidic activated carbon produced by a chemical method is used as a filler, which can be purchased from Shanghai Tangxin Activated Carbon Co., Ltd.), mix them evenly, and pack them into bags to obtain the soil remediation agent 1 of this embodiment; Sodium dihydrogen 10kg and gac 20kg and the soil remediation agent 20kg of embodiment 1, mix homogeneously, pack, promptly get the soil remediation agent 2 of the present embodiment; Get the soil remediation agent 20kg of gac 20kg and embodiment 1, mix homogeneously, As a positive control; another 20kg of activated carbon was used as a negative control.
[0088] Entrusted the Soil and Fertilizer Research Institute of Sichuan Academy of Agricultural Sciences to conduct a planting test of rape (variety: Mianyou 12) in a small piece of cadmium-contaminated paddy s...
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