江汉平原湖积型涝渍地土壤物理环境质量评价  

Evaluation of Soil Physical Environment Quality in Lacustrine Deposit Waterlogged Land of Jianghan Plain

作　　者：艾天成[1] 李方敏[2] 原雄人 

机构地区：[1]湖北省涝渍灾害与湿地农业重点实验室(长江大学),湖北荆州434025 [2]长江大学农学院,湖北荆州434025 [3]日本国际协力事业团,日本东京1518558

出　　处：《湖北农学院学报》2004年第4期245-247,275,共4页Journal of Hubei Agricultural College

基　　金：湖北省"九五"重点攻关资助项目(962P0503 06);湖北省教育厅资助项目(96A047)和开放基金资助项目(2003KFJJ03)

摘　　要：对江汉平原湖积型涝渍地域土壤硬度、耕层厚度、结构性、容重、质地等物理环境质量进行了监测。结果表明:涝渍地土壤深厚,有效土层均在1 0m以上;质地以中壤为主,约占83%,过砂过粘的土壤较少;耕层土壤厚度过浅,机耕可有效增加耕层厚度;耕层土壤硬度5～7kg/cm2;犁底层硬度能满足大型机械作业,1m以内无硬盘层出现;土壤障碍层次为浅位中、厚层夹砂或夹粘层;地下水位过高,小于60cm的占39%,局部地区比例更大;结构性和渗透性不良;三相比例失调,水多气少,固相率偏高。多项物理指标需要改良。The physical properties such as soil hardness, thickness of cultivated horizon, soil structure, soil bulk density and soil texture were measured in the lacustrine deposit waterlogged land of Jianghan Plain. The results showed that the cultivatable soil depth was all above 1.0 m. In soil texture, loam soil was 83%, sand and clay were less. The cultivated horizon was too shallow and machinery cultivation can increase thickness of cultivated horizon effectively. Soil hardness was 5～7 kg/cm^2 and there was no hard-pan layer in cultivated horizon;Specific horizon in the partial region was sand or clay horizon with shallow middle and thick bed;Underground water level was high, those smaller than 60 cm occupied 38% in area. The structure and permeation was bad;Three appearance of solid∶ air∶water is out of tune, with too much water, cend too little air, the rate of solid is higher. In conclusion, several physical index were to be improved.

关 键 词：江汉平原 湖积型涝渍地 土壤物理环境 质量评价 土壤改良 

分 类 号：S156[农业科学—土壤学] X82[农业科学—农业基础科学]