Paddy rice sprout cultivation composite nutrient medium, and preparation method thereof
A nutrient matrix and rice seedling raising technology, which is applied in the direction of urea compound fertilizer, fertilizer mixture, application, etc., can solve the problems of weak water and fertilizer retention capacity of river sand, great difference in physical and chemical properties, low water conductivity and air permeability, etc., and achieve the goal of increasing production. The effect of obvious increase in cost, saving transportation costs and increasing farmers' economic benefits
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Embodiment 1
[0038] Preparation of carbonized rice husk: Take pure rice husk, a by-product of the rice processing factory, and put it into a cylindrical aluminum box with a volume of 2L, and squeeze it down with a wooden mallet to compact the rice husk as much as possible to remove air. . Then screw on the cap to keep it airtight. Repeat this filling process for a total of 16 packs. Put 8 aluminum boxes among them in the muffle furnace, heat, adjust the temperature controller at 335°C, pay attention to observation, and keep the temperature in the furnace at 330-340°C. Continue for 3.5 to 4.5 hours. When there is no white water vapor or smoke in the furnace, cut off the power supply, cool down to room temperature naturally, and pour it out to be carbonized rice husk. Repeat this process and carbonize another 8 boxes of rice husks for later use.
[0039] Pretreatment of attapulgite powder, vermiculite and peat: Take 50L each of commercial attapulgite, vermiculite and peat, and pass attapu...
Embodiment 2
[0043] In Example 2 and the following Example 3, the preparation of carbonized rice husk, the pretreatment of peat and vermiculite, and the preparation method and process of seedling strengthening agent are the same as in Example 1 above.
[0044] Measure 8.0L, 18.5L, 17.0L, 4.5L, and 2.0L of carbonized rice husk, peat, vermiculite, attapulgite, and seedling strengthening agent prepared or treated above, mix well, and pass through a sieve with an aperture of 10mm. The finished matrix 50L was obtained, which was the No. 2 matrix prepared by the present invention.
Embodiment 3
[0046] Measure and mix 31.0L, 9.5L, 5.5L, 3.0L and 1.0L of carbonized rice husk, peat, vermiculite, attapulgite and seedling strengthening agent prepared or treated above, mix well, and pass through a 10mm aperture sieve , to obtain the finished matrix 50L, which is No. 3 matrix prepared in the present invention.
[0047] Take by weighing the above-mentioned No. 1, 2, 3 substrates prepared in an appropriate amount respectively, and measure the water physical properties, organic matter, nutrient content and salinization index of the substrates according to "Soil Agrochemical Analysis" edited by Bao Shidan and published by China Agricultural Press in 2000. Listed in Table 1 and Table 2.
[0048] The test result of table 1 shows that 3 kinds of rice seedling-raising special-purpose composite nutritional substrates prepared by the present invention all have good water retention, water supply and aeration capacity, moderate bulk density, and salinity meets the requirements, satisfy...
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