高产稻田“七促”管水法

• 作 者: 尹红民
• 机 构: 江西省吉水县黄桥乡农技站
• 出 处: 农业科技通讯
• 发表日期: 1985年06期
• 关键词: 还原物质 速效养分 好气性微生物 氧化还原电位 空秕率 水稻专家 水法 毒害 晒田 露田

水稻既要水又怕水,正如日本水稻专家出口昭弘先生所谈:“水稻是在水边生长的,而无需在水中长。”从栽培理论和生产实践来看,田里长期灌水,土壤不通气,其害处很多:(1)好气性微生物难以活动和繁殖,使土壤不能新陈代谢,失去活力,变成“死土”;(2)有机质难以氧化分解,土壤虽有肥,但缺肥力,速效养分十分缺乏;(3)氧化还原电位偏低(Eh在300mv以下),禾苗易遭受还原物质(Fe~(++)、H_2S等)的毒害,引起黑根坐蔸,甚至死苗;(4)难以提高土温,使土性变冷,禾苗迟发,空秕率高。这些都是水多伤根、涝害闭气的结果。

Rice is water and scared of water, just as Mr. Zhaowong, a Japanese rice expert, says: “Rice grows on the water’s edge without being long in the water.” From the perspective of cultivation theory and practice, Ventilation, its harm many: (1) aerobic organisms difficult to activity and reproduction, the soil can not be metabolism, loss of vitality, become “dead soil”; (2) organic matter is difficult to oxidative decomposition, although fertile soil, but lack of fertility, quick effect (3) the redox potential is low (Eh is below 300mv), and the seedling is susceptible to the poisoning of reducing substances (Fe ~ (++), H_2S, etc.) ) Difficult to improve soil temperature, so that the cold soil, late seedlings, empty rate is high. These are the results of watery wounds and waterlogging.