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冬耕晒垡熟化土壤,是水稻增产的一项重要耕作措施。土壤经过冬耕晒垡以后,土壤中的水热状况,耕性,土壤微生物活动及土壤养分含量都较未冬耕晒垡的结板田有很大的改善。据调查研究测定,板田过冬的稻田,仅0.5—1.0厘米左右的薄层表土接受冻晒,形成棕灰色片状结构,而冬耕晒垡的稻田,则片状结构可深达垡心5厘米左右。因此,经过翻耕冻晒的稻田,灌水后容易松碎。又由于土壤结构的改善,冻晒田日平均温度可比板田提高1—2℃,使水稻插秧后,能早
Winter plowing maturing soil, rice is an important tillage measures for increasing production. After winter tillage and drying, soil water and heat conditions, tillage, soil microbial activity and soil nutrient content than the winter tillage sunbajian paddy field has greatly improved. According to the investigation and study determination, paddy field winter paddy fields, only about 0.5-1.0 cm thin layer of topsoil to receive freeze-drying, the formation of brown-gray sheet-like structure, and winter plowing of the paddy fields, the sheet structure can reach deep heart 5 Cm or so. Therefore, after tillage paddy fields, easy to loose after irrigation. Due to the improvement of soil structure, the daily average temperature of frozen baskets can be increased by 1-2 ℃ than that of paddy fields, so that after rice transplanting,