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贛南山区的冷浸性低产田面积很大。在不利的水肥气热条件下,土壤有效肥力很低;耕作栽培制度簡单,每年只种植一季晚稻,冬季休閑;亩产200~300斤,是当地粮食平衡增产的严重障碍。冷浸田的类型主要有如下几种:一种是銹水田,分布在花崗岩和云母岩山間谷地;排水不良泥脚很深,水土溫度均低,还原过程占优势,有机质积累較多,同时还出銹水,即土壤中过量的亚鉄經氧化后形成高鉄胶膜,浮載水面;对水稻幼苗的生长发育起着毒害作用,插秧后10日左右良能返青,分蘖迟而且少,穗短粒少,产量低。第二种是田面不出銹水,仅以
The area of cold-soaked low-yield fields in southern Jiangxi is very large. Under unfavorable conditions of water, fertilizer and fertilizers, soil fertility is very low; cultivation and cultivation systems are simple; only one season of late rice is planted each year and winter is relaxed; and 200-300 kg of mu are produced per mu, which is a serious obstacle to balanced production of local grain. Cold paddy fields are mainly the following types: one is rust paddy field, distributed in the valley between granite and mica rock; poor drainage mud deep feet, soil and water temperature are low, the reduction process is dominant, more accumulation of organic matter, but also Excessive rust in the soil, that is, the excessive formation of highland barley after oxidation, floating surface; on the growth and development of rice seedlings play a toxic role, about 10 days after transplanting good green, tiller late and less, spike Short grains, low yield. The second is the surface rust, only to