基于产量和养分含量的旱地小麦施磷量和土壤有效磷优化

马清霞,王朝辉,惠晓丽,张翔,张悦悦,侯赛宾,黄宁,罗来超,张世君,党海燕

Optimization of Phosphorus Rate and Soil Available Phosphorus Based on Grain Yield and Nutrient Contents in Dryland Wheat Production

MA QingXia,WANG ZhaoHui,HUI XiaoLi,ZHANG Xiang,ZHANG YueYue,HOU SaiBin,HUANG Ning,LUO LaiChao,ZHANG ShiJun,DANG HaiYan

图2 施磷量与小麦产量、生物量、收获指数的关系 图中2015、2016、2017年分别表示2014—2015、2015—2016、2016—2017年3个小麦生长年份;小写字母表示各处理3年平均值有显著差异（P<0.05）;大写字母表示年际平均值间有显著差异（P<0.05）。竖线表示LSD0.05, 即同一施磷量两点间距离大于竖线长度表示同一处理年际间达到95%的显著水平。下同

Fig. 2 Effects of P rates on winter wheat grain yield, biomass and harvest index 2015, 2016 and 2017 in figures represent the year of wheat growth in 2014-2015, 2015-2016 and 2016-2017, respectively. Different lowercase letters in the figure show significant differences among treatment averages over the 3 experimental years at P<0.05; Different uppercase letters show significant differences among averages over treatments in a year P<0.05. The line segments express LSD0.05, which means the difference is significant when the distance between two points of the same treatment exceeds the segment leng that P<0.05. It is the same in the following figures