Method for increasing yield of selenium-enriched rice by increasing tillering
A rice production technology, applied in the field of nano-agriculture, can solve the problems of less than 20% utilization efficiency, serious soil environment, and no application amount mentioned, and achieve high bioavailability, improve soil environment, and increase effectiveness
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Embodiment 1
[0066] A preparation method of spherical Se NMs, comprising the following steps:
[0067] (1) Weigh 0.11 g of selenium dioxide and 0.36 g of ascorbic acid, the molar ratio of the two is 1:2, put into a mortar, after mixing, fully grind at 20 ° C for 1-10 min, until red paste;
[0068] (2) adding 20 mL of deionized water to the red paste obtained by grinding in step (1) to disperse;
[0069] (3) Pour the solution obtained in step (2) into a container, add 47 mg of polyvinylpyrrolidone (PVP) to it, carry out 20°C, 300W ultrasonic treatment for 60min, and centrifuge at 4°C at 10000r / min after the treatment is completed, and the resulting precipitate Freeze-drying was performed to finally obtain spherical Se NMs.
[0070] The performance of the obtained spherical Se NMs is tested, and the test results are shown in Table 1:
[0071] Table 1 Characterization of spherical Se NMs
[0072] particle size Hydration radius charge purity 60nm 180nm -16.6mV 99% ...
Embodiment 2
[0074] A method for increasing tiller to improve the yield of selenium-enriched rice, comprising the steps of:
[0075] (1) growing the rice seeds from the Jiangsu Academy of Agricultural Sciences in the seedling base;
[0076] (2) The rice seedlings in the period of "two leaves and one heart" are selected by machine transplanting and transplanted in standard rice fields (the planting density is 10,000 seeds per mu);
[0077] (3) Cultivate for 10 days to reach the period of "three leaves and one heart", spray 1.5mg / L of the spherical Se NMs aqueous solution of Example 1 on the foliar surface, continue to cultivate for 140 days, and harvest the rice; wherein the spraying amount is 1mL / plant .
Embodiment 3
[0103] Referring to the synthesis method of spherical Se NMs in patent CN112010271A, adjusting the particle size of spherical Se NMs in Example 1 to 10 nm, 40 nm, 100 nm and 200 nm, and keeping the others consistent with those in Example 2, rice was obtained.
[0104] The obtained rice was tested, and the test results were as follows:
[0105] The test result of table 3 embodiment 3
[0106]
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