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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 2. Отображено 2.
04-07-2023 дата публикации

Nano micro-alkaline irrigation water for controlling acid and reducing cadmium and method for irrigating rice

Номер: CN116376556A
Автор: ZHOU JING, YOU LAIYONG, FEI JIASAI, ZHANG LIHAO, LIANG JIANI, ZHOU JUN, HE YURAN, MA HAORUI
Принадлежит:

The invention provides nano micro-alkaline irrigation water for controlling acid and reducing cadmium in acidic rice soil and a method for irrigating rice, and belongs to the technical field of safety production of moderately and mildly polluted farmlands. Nano calcium carbonate and nano hydroxyapatite are used as main passivation materials, part of trace nano manganese oxide and nano zinc oxide are matched, the nano particles directly enter a field along with irrigation water by utilizing the suspension and dispersion characteristics of the nano particles, and the nano particles of pores (cracks and root holes) generated by draining the soil of the rice field in the early stage are directly gathered at the rhizosphere of the rice; the pH of the soil is improved, so that the Cd is prevented from being released from the soil and entering the rice body, and the Cd content in the rice is further reduced.

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Номер записи: 1
23-06-2023 дата публикации

Simplified method for reducing cadmium pollution of rice

Номер: CN116267471A
Автор: ZHOU JING, YOU LAIYONG, ZHOU JUN, ZHANG LIHAO, LIANG JIANI, HE YURAN, MA HAORUI
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The invention provides a simplified method for reducing cadmium pollution of rice, and belongs to the technical field of crop planting. Aiming at the production characteristics of high temperature, strong evaporation, drainage in the filling stage and the like of the cadmium-polluted rice field in southern China in the filling stage, proper shading (the shading rate is 30-60%) treatment is carried out when the rice begins to enter the filling stage (20-25 days before harvesting), and the cadmium content in the rice can be greatly reduced under the condition that the yield is not influenced. The method provided by the invention is low in investment cost, simple and convenient to operate, remarkable in cadmium reduction effect and suitable for large-scale popularization and application, and potential hazards possibly caused by large-area investment of passivation materials are avoided.

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Номер записи: 2