农田土壤板结治理方案2017 年 7 月目 录第一章 概论.........................................................11 引言..........................................................1第二章 土壤板结的危害.............................................22.1 对土壤肥力特性的影响....................................32.1.1 物理性质...............................................32.1.2 化学性质...............................................42.1.3 生物学性质...........................................52.2 对作物生长的影响.............................................62.3 对当地环境与生态条件的影响...............................7第三章 土壤板结的影响因素...........................................73.1 机械压实.....................................................73.2 施肥.....................................................83.3 土壤自身特性.............................................93.3.1 含水量及容重...........................................93.3.2 有机质含量........................................103.3.3 土壤质地..........................................103.3.4 土壤团聚体........................................11第四章 土壤板结的评价指标......................................124.1 容重和孔隙度............................................124.2 硬度....................................................134.3 导水与持水性能指标......................................134.4 透气性指标..............................................154.5 压缩特性指标............................................15第五章 土壤板结的改良方法......................................155.1 提高土壤有机质含量......................................165.2 控制农业机械的使用......................................175.3 机械深松....................................................175.4 作物轮作................................................185.5 秸秆还田....................................................18第一章 概论1.1 引言土壤板...
