Volcanic gravel type flue-cured tobacco seedling substrate and preparation method thereof
A technology for raising seedlings and volcanic stones, which is applied in fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as no successful reports, and achieve the effects of increasing water retention and ventilation capacity, wide sources, and good development.
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[0020] Example 1. Preparation of volcanic gravel seedling substrate
[0021] Collected volcanic gravel and volcanic ash soil (0-25cm arable layer soil) widely distributed in the wild in Tengchong County, Yunnan Province, dried, air-dried, beaten, and passed through a 40-50 mesh sieve, with the largest particle size <6mm; at the same time, the corn stalks and rice husks are air-dried, air-dried, and crushed, and then passed through a 40-50 mesh sieve, the largest particle size <6mm.
[0022] The bulk density of volcanic ash soil is 0.87g / cm 3 , The pH value is 6.03, the soil organic matter content is 3.80%, the alkali-hydrolyzable nitrogen content is 127mg / kg, the available phosphorus (Olsen-P) content is 13.4mg / kg, the available potassium (NH 4 OAc-K) content is 247mg / kg.
[0023] Using a volume meter, mix the volcanic gravel, volcanic ash soil, corn stalks, and rice husks in a volume ratio of 3:3:2:2, 4:2:2:2, and then pile up and mature for 28 days after adding water , Turn the pil...
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[0026] Example 2. Verification of the effect of flue-cured tobacco seedlings on the volcanic gravel seedling substrate
[0027] In order to verify the actual effect of the volcanic gravel seedling substrate, the inventors used the conventional peat substrate material (the proportion of peat is 53%) as a control, and the tested flue-cured tobacco variety was Yunyan 87 coated seed, and carried out a comparative test of tobacco floating seedlings. The floating seedling tray uses a 200-hole polystyrene foam grid tray with a size of 34cm×68cm×6cm. The single bowl is in the shape of an inverted stepped platform, the diameter of the small hole at the bottom is 0.6cm, and the volume of the single cavity is about 27cm 3 . Three repetitions are set for each treatment, and 3 trays are repeated each time. The same duplicates are placed in the same nursery pond.
[0028] Table 2 Main agronomic characteristics of flue-cured tobacco seedlings treated with different seedling substrates (seeding ...
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