基于土壤有机质含量推荐的旱地冬小麦施氮量研究

蒋龙刚,黄明,宋庆赟,苑爱静,李嘉华,邱炜红,王朝辉

Research on Nitrogen Fertilizer Application Recommended Method Based on Soil Organic Matter in Dryland Wheat Production

JIANG LongGang,HUANG Ming,SONG QingYun,YUAN AiJing,LI JiaHua,QIU WeiHong,WANG ZhaoHui

表1 各试验地点开始前土壤的基本理化性状和0—100 cm土层硝态氮累积量

Table 1 Properties of the soil and nitrate in 0-100 cm soil sampled at wheat harvest when the experiments were initiated

试验地点Experimental sites pH 0—20 cm土层 有机质含量 Organic matter content in 0-20 cm soil layer (g·kg-1) 0—40 cm土层 硝态氮含量 Nitrate-N content in 0-40 cm soil layer (mg·kg-1) 0—40 cm土层 有效磷含量 Available P content in 0-40 cm soil layer (mg·kg-1) 0—40 cm土层 有效钾含量 Available K content in 0-40 cm soil layer (mg·kg-1) 0—100 cm土层 硝态氮积累量 Nitrate residue content in 0-100 cm soil layer (kg·hm-2) 彬县BX 8.3 14.3 11.8 11.3 131 153 凤翔FX1 8.3 13.6 16.8 11.6 121 292 凤翔FX2 8.1 11.1 17.4 9.9 106 153 合阳HY 8.5 14.0 7.7 10.0 187 251 蒲城PC 8.2 12.1 5.2 11.0 173 123 耀州YZ1 8.3 16.0 9.3 14.7 180 74 耀州YZ2 8.1 15.6 54.8 4.9 135 410 永寿YS 8.2 12.4 10.9 11.3 110 104 平均Mean 8.3 13.6 16.7 10.6 143 195