I'm a rice farmer innovator. RICE IS NOT AN AQUATIC PLANT, but just water-intensive. Grow it outside of water with rain.
SDG’s of application
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In general, over 3 tons of water is needed per kg of rice. However, rice consumes about 10-30% and the remainder is wasted like evaporation and percolation. Simultaneously, when rice is grown in water, decomposition of organic matter emits a large amount of methane (CH4) with a global warming potential of 28. Rice paddies are the largest man-made methane source. According to IPCC’s 5th assessment report, paddy rice cultivation is a major source of global methane emissions, which in 2010 were estimated to be 1.5 – 2.3 % of global greenhouse gases. Since rice grows in water, it has been cultivated in areas that are most vulnerable to climate change, using huge water and emitting large amounts of methane. Rice cultivation is a victim and criminal of climate change. But rice grows better when oxygen is supplied to its roots because RICE IS NOT AN AQUATIC PLANT. Why then do we grow rice in water? The answer is to control weeds. Without water, aerobic weeds with the greatest population dominate the fields and rice can’t grow. The solution can be accomplished using Dry Soil Direct Sowing using Biodegradable Film with Seeds, called Seed Film Cultivation (SFC). SFC minimizes water consumption by eliminating water wastage and minimizes methane emissions by growing rice outside the water. The main steps to grow rice with SFC are: (1) attach seeds to biodegradable film, (2) spread out the film in dry rice field, (3) grow rice outside water with drip irrigation. Seed-attacher and Mulcher are invented: https://youtu.be/Pve8qHMYpbQ https://youtu.be/69jjq0cFyNo SFC is expected to save water over 70%, reduce almost of methane, and save labor 50% compared to conventional rice farming. And SFC can increase yields due to film mulching. Although the SFC requires $500/ha biodegradable film with eco-adhesive, SFC is cost effective because it can produce a considerable amount of eco-friendly rice with less labor, less water and without methane. SFC is most needed in Africa, where all countries import rice. But there are 600 million hectares of empty arable land in Africa. The problem is that most farmers are reluctant to grow rice there because they suffer losses. According to Rice Almanac (4th edition, 2013), the yield of irrigated rice field exceeds 5 tons of paddy rice, but that of rain-fed field is 1 ton. But the huge empty arable land belongs to the rain-fed field. The price of paddy rice in West Africa is about $ 250 / ton, and rice farming cost is about $1000 / ha. A yield below 4 tons means a loss to farmers. Therefore, rain-fed rice farming is subsistence agriculture to avoid hunger, not for business purposes. Even if 6 million ha are empty, very few are used for rice farming. So, Africa has to import rice because the irrigation system is not enough for irrigated rice farming and because farmers are reluctant to participate in rain-fed rice farming. But, irrigated rice farming can’t be a solution to Africa with large land and no money. The only solution is to raise the yield of rain-fed rice farming, which is only 1 ton. Why is the yield of rain-fed rice farming so low? The reason is that if there is no water, the most populous aerobic weeds dominate the fields and the soil nutrients are washed away by the rain. The reason humans have cultivated rice in water for a long time is not because rice is an aquatic plant, but because water controls weeds and maintains soil nutrients. If biodegradable films control weeds and prevent moisture and soil nutrient losses, rice doesn’t need to be grown in water. Seed-attached biodegradable films in the tropical savannah region can be used to grow rice at high yields with only rainfall without irrigation facilities. If the Seed-film is loaned to subsistence farmers in the rain-fed field, it will be able to harvest more than 6 tons of rice, and pay 2 tons of rice for biodegradable film costs. SFC was completed with Technology Convergence, combined with biodegradable film, mechanical engineering, and rice farming. The Seed-attacher is our own patented technologies, but biodegradable films don't belong to us and already common. After mulching, it decomposes 90% for 180 days and is completely decomposed into 100% H2O and CO2 because the base polymers, which are composed of PLA (polylactic acid), PBAT (polybutylene adipate terephthalate), and TPS (thermoplastic starch), are100% biodegradable.
Seed-attacher and Mulcher
Rice that is not an aquatic plant should be grown outside the water for sustainability.
Own patented inventions: 1) Seed-attacher attaches non-germinated seeds to biodegradable films with cutting holes for sprouting and makes the Seed-Film. 2) Mulcher spreads out the Seed-Film on dry fields and covers the film with soil.