紫色土坡耕地耕层质量障碍特征

宋鸽,史东梅,曾小英,蒋光毅,江娜,叶青

Quality Barrier Characteristics of Cultivated Layer for Sloping Farmland in Purple Hilly Region

Ge SONG,DongMei SHI,XiaoYing ZENG,GuangYi JIANG,Na JIANG,Qing YE

表1 紫色土坡耕地耕层土壤属性指标及农作物产量

Table 1 Soil property index and crop yield of cultivated layer in purple soil slope farmland

地块号 Block number 行政区域 Administrative region 土壤紧实度 Soil compaction 耕层厚度 Topsoil thickness (cm) 心土层厚度 Subsoil layer thickness (cm) 有效土层厚度Effective thickness of soil layer (cm) 田面坡度 Slope (°) 土壤有机质 Soil organic matter (g·kg-1) 阳离子交换量 Cation exchange capacity ( cmol(+)·L-1) 土壤全氮 Soil total nitrogen (g·kg-1) 土壤有效磷 Soil effective phosphate (mg·kg-1) 农作物产量 Crop yield (t·hm-2) 地力等级 Productivity grade of cultivated land 1 万州区 Wanzhou District 疏松 Loose 20 20 40 5 19.5 32.1 1.0 12 9.00 一级 First grade 2 万州区 Wanzhou District 疏松 Loose 22 23 45 5 10.0 27.6 0.7 10 6.75 二级 Secondary grade 3 万州区 Wanzhou District 疏松 Loose 20 30 50 10 9.7 16.3 0.9 3 5.25 三级 Third grade 4 万州区 Wanzhou District 疏松 Loose 15 5 20 15 7.0 19.9 0.4 10 4.50 四级 Fourth grade 5 万州区 Wanzhou District 疏松 Loose 20 0 20 25 9.9 18.9 0.8 3 4.50 五级 Fifth grade 6 云阳县 Yunyang Country 疏松 Loose 25 15 40 6 14.6 31.8 0.9 9 9.75 一级 First grade 7 云阳县 Yunyang Country 疏松 Loose 25 25 50 7 9.0 21.1 0.6 7 9.25 二级 Secondary grade 8 云阳县 Yunyang Country 较紧实 Relatively compact 24 16 40 12 19.9 22.4 1.4 6 8.00 三级 Third grade 9 云阳县 Yunyang Country 疏松 Loose 20 20 40 16 12.3 24.8 0.7 4 6.50 四级 Fourth grade 10 云阳县 Yunyang Country 松散 Unconsolidated 20 0 20 20 5.3 28.4 0.4 4 5.25 五级 Fifth grade 11 北碚区 Beibei District 疏松 Loose 20 15 35 5 12.4 28.4 0.9 18 9.00 一级 First grade 12 北碚区 Beibei District 疏松 Loose 19 21 40 5 12.9 24.7 1.0 6 7.88 二级 Secondary grade 13 北碚区 Beibei District 疏松 Loose 20 10 30 10 16.6 17.4 1.1 45 7.13 三级 Third grade 14 北碚区 Beibei District 疏松 Loose 25 0 25 15 10.0 20.8 0.6 1 6.38 四级 Fourth grade 15 北碚区 Beibei District 疏松 Loose 15 0 15 25 10.6 28.8 0.7 6 5.63 五级 Fifth grade 16 綦江区 Qijiang District 疏松 Loose 20 20 40 5 12.2 12.9 0.8 29 9.30 一级 First grade 17 綦江区 Qijiang District 较疏松 Relatively loose 20 20 40 12 14.4 22.6 1.3 6 6.00 二级 Secondary grade 18 綦江区 Qijiang District 疏松 Loose 20 15 35 10 16.9 18.3 1.1 104 5.25 三级 Third grade 19 綦江区 Qijiang District 疏松 Loose 25 15 40 11.5 16.8 12.7 0.6 19 4.50 四级 Fourth grade 20 綦江区 Qijiang District 疏松 Loose 20 0 20 25 18.7 0.1 1.0 139 4.12 五级 Fifth grade 21 江津区 Jiangjin District 疏松 Loose 15 15 30 5 14.0 28.6 1.2 2 6.38 一级 First grade 22 江津区 Jiangjin District 疏松 Loose 19 21 40 5 12.9 21.5 1.0 6 6.00 二级 Secondary grade 23 江津区 Jiangjin District 疏松 Loose 20 20 40 10 10.5 15.8 0.8 1 5.25 三级 Third grade 24 江津区 Jiangjin District 疏松 Loose 20 10 30 15 21.1 16.6 1.1 14 4.50 四级 Fourth grade 25 江津区 Jiangjin District 疏松 Loose 20 10 30 15 16.3 14.1 1.2 0 4.13 五级 Fifth grade 26 彭水县 Pengshui County 疏松 Loose 20 25 45 5 19.6 11.5 1.3 4 9.75 一级 First grade 27 彭水县 Pengshui County 疏松 Loose 20 20 40 7 15.6 12.2 1.0 27 9.10 二级 Secondary grade 28 彭水县 Pengshui County 疏松 Loose 20 10 30 14 14.0 16.5 1.1 8 7.75 三级 Third grade 29 彭水县 Pengshui County 疏松 Loose 20 0 20 16 9.6 25.4 1.2 9 6.00 四级 Fourth grade 30 彭水县 Pengshui County 较紧实 Relatively compact 20 0 20 22 23.4 10.4 1.5 4 5.55 五级 Fifth grade 31 巴南区 Banan District 较疏松 Relatively loose 20 10 30 5 22.8 13.0 1.3 51 9.75 一级 First grade 32 巴南区 Banan District 较疏松 Relatively loose 20 20 40 7 15.5 25.8 1.0 8 8.10 二级 Secondary grade 33 巴南区 Banan District 疏松 Loose 15 10 25 14 32.3 12.7 1.5 27 5.50 三级 Third grade 34 巴南区 Banan District 疏松 Loose 20 0 20 17 14.8 - 1.0 14 6.00 四级 Fourth grade 35 巴南区 Banan District 疏松 Loose 20 0 20 17 12.6 17.3 0.8 18 5.55 五级 Fifth grade