摘要
对四川盆地冬水田的成因分析表明,在自然因素中,以气候因素>地因素>土地因素>土壤因素;在社会因素中,则以保灌面积比为最重是。仅当气候、地貌条件较为一致的区域,土壤类型对冬水田比例才起决定作用。四川盆地冬水田的分布具区域性,可分为盆周山地、川西平原、盆中丘陵、(?)北低山深丘、盆南浅中丘及盆东平行岭谷等6个区域,各区域冬水田比例的主导因素各不相同。
Of the natural factors contributing to the formation of winter water-logged fields inSichuan,climatic factors secm to be predominant,followed by geomorphologicl factors.Soil plays but a minor role,and is decisive only in regions with similar climatic andgeomorphological conditions.Of the social factors,the rate of irrigation-guaranteedacrage appcars to be most important.The winter water-logged fields in the province aredivided into six regions.The practice of maintaining winter water-logged fields has manyadverse effects on the agro-ecosystem in the Sichuan Basin:lowering per-unit-area yieldof rice and wheat,decreasing cropping index,reducing winter crop planting area and someothers.A few atrategies of improving the productivity of such fields are also discussed.
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第4期424-428,共5页
Journal of Southwest Agricultural University
关键词
冬水田
成因
区域性
四川盆地
Sichuan-basin
cause of formation
region
/winter water-logged field
