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6 各试验点2014—2017年冬小麦的氮吸收量、氮收获指数、氮肥偏生产力

Table 6 N uptake, N harvest index, and N partial productivity of winter wheat at different experimental sites during 2014-2017

生长季 Growing season 试验地点Experimental site 氮吸收量 Shoot N uptake (kg·hm-2) 氮收获指数 N harvest index (%) 氮肥偏生产力 N partial productivity (kg·kg-1) 农户习惯施肥FP 推荐施肥OFP 农户习惯施肥FP 推荐施肥OFP 农户习惯施肥FP 推荐施肥OFP 2014—2015 彬县BX 213.5b 258.4a 63.7a 56.7b 27.9b 37.5a 凤翔FX 184.1a 185.2a 75.6a 80.9a 29.9a 34.7a 合阳HY 179.8a 176.9a 64.8a 70.9a 38.2b 59.8a 蒲城PC 169.2a 169.5a 73.4a 75.3a 26.0b 45.1a 耀州YZ 182.1a 171.2a 70.3a 69.9a 37.4b 47.8a 永寿YS 281.5a 293.4a 46.3a 46.9a 34.6b 42.0a 平均Mean 201.7a 209.1a 65.7a 66.8a 32.3b 44.5a 2015—2016 彬县BX 252.5b 303.5a 68.8a 61.7b 33.3b 43.4a 凤翔FX 160.0a 166.3a 83.2a 83.9a 32.2a 32.2a 合阳HY 110.6a 123.6a 81.7a 81.8a 20.8b 31.6a 蒲城PC 81.6a 85.7a 80.0a 79.5a 10.8a 14.2a 耀州YZ 185.1a 202.1a 83.2a 81.1a 42.0b 53.8a 永寿YS 136.7a 151.7a 85.0a 84.9a 30.1b 39.4a 平均Mean 154.4b 172.1a 80.3a 78.8a 28.2b 35.8a 2016—2017 彬县BX 217.6a 237.6a 68.2a 68.1a 28.8b 34.5a 凤翔FX 141.6a 145.5a 75.2a 75.7a 28.6a 30.8a 合阳HY 129.3a 112.8a 83.3a 83.4a 26.8b 37.0a 蒲城PC 64.9a 69.3a 77.8a 78.4a 11.6a 11.3a 耀州YZ 105.0a 113.6a 82.9a 80.4a 20.7a 23.9a 永寿YS 208.4a 220.3a 74.1a 77.9a 32.4b 47.2a 平均Mean 144.5a 149.8a 76.9a 77.3a 24.8b 30.8a 2014—2017 彬县BX 227.9b 266.5a 66.9a 62.2b 30.0b 38.5a 凤翔FX 161.9a 165.7a 78.0a 80.2a 30.2a 32.6a 合阳HY 139.9a 137.8a 76.6a 78.7a 28.6b 42.8a 蒲城PC 105.2a 108.2a 77.1a 77.7a 16.1b 23.5a 耀州YZ 157.4a 162.3a 78.8a 77.1a 33.4b 41.8a 永寿YS 208.8a 221.8a 68.5a 69.9a 32.3b 42.9a 平均Mean 166.9b 177.0a 74.3a 74.3a 28.4b 37.0a 变异来源 Source of variance 生长季Growing season 54.4** 90.0** 60.5** 地点Site 118.8** 90.4** 91.6** 处理Treatment 7.4* 0 222.9**