湖南祁阳县土壤酸化主要驱动因素贡献解析

周海燕,徐明岗,蔡泽江,文石林,吴红慧

Quantitative Analysis of Driving-Factors of Soil Acidification in Qiyang County, Hunan Province

ZHOU HaiYan,XU MingGang,CAI ZeJiang,WEN ShiLin,WU HongHui

表6 小麦-玉米长期试验籽粒秸秆产量及养分含量

Table 6 Grain dry matter yield and element contents for long term experiment of wheat-corn

作物类型 Crop types 平均产量Average yield (kg·hm-2·a-1) 养分含量 Element content (%) 1990-1995 1996-2000 2001-2005 2006-2010 2011-2012 P K Ca Mg 小麦 Wheat 籽粒Grain 1788 905 928 374 316 0.364 0.48 0.047 0.15 秸秆 Straw 1967 995 1020 411 347 0.80 1.05 0.52 0.17 玉米 Corn 籽粒 Grain 3369 3237 1858 1326 1188 0.26 0.39 0.007 0.12 秸秆 Straw 3032 2913 1672 1194 1088 0.15 1.18 0.54 0.22