基于气象及土壤因素对连云港地区水稻区划的研究

Study on the Rice Regionalization Based on the Factors of the Weather and the Soil in Lianyungang Areas

连云港地区属于江苏省水稻区划的典型中熟中粳稻作区。此文主要从气象和土壤角度对该地区水稻生态环境,特别是降水、土壤盐分、土壤养份和质量、重金属污染等情况进行研究和分析,结果表明:(1)水分对水稻生长影响不大。(2)部分地区耕作层盐分较高,不利于水稻的生长和发育。(3)与20年前土壤普查相比,土壤质量发生了较大的变化。(4)土壤砷、镉、铬、铅、汞和铜的单项污染指数P<1,污染分担率排序为:砷(36.07%)>铅(27.89%)>铬(14.54%)>镉(10.39%)>汞(8.52%)>铜(2.59%),土壤主要以砷、铅污染为主。基于此,该地区水稻可进一步细分为四个亚区,这也为沿海稻区及相似地区水稻区划提供参考。

Middle-mature japonica rice is mainly planted in Lianyungang areas in jiangsu province.The paper mainly studied and analyzed rice ecological environment,rainfall,soil salt content,soil nutrients and heavy metal pollution based on weather and soil materials,the results were as follows.（1） Moisture factor for rice growth is little affected.（2） Parts of the non-plough layer,to the detriment of the high salinity rice growth and development.（3） Single pollution indexes of arsenic（As）,plumbum（Pb）,cadmium（Cd）,chromium,mercury and Cu were below 1,pollution share rate was arranged as follows：As（36.07%）〉 Pb（27.89%）〉 chromium（14.54%）〉 Cd（10.39%）〉 mercury（8.52%） 〉Cu（2.59%） and As Pb were the two major pollution resources.Based on the factors,The area of rice can be further into four sub zone in order to perfect rice regionalization and afford reference to coastal and some similar areas.