不同磷敏感棉花品种临界磷浓度稀释模型与磷营养诊断

庞保刚,曹楠,周治国,赵文青

Critical Phosphorus Concentration Dilution Model and Phosphorus Nutrition Diagnosis in Two Cotton Cultivars with Different Phosphorus Sensitivity

PANG BaoGang,CAO Nan,ZHOU ZhiGuo,ZHAO WenQing

表3 棉花临界磷浓度（CPC）测定值与模拟值（2018年）

Table 3 Observed and simulated values of critical phosphorus concentrations in cotton in 2018

生育期 Stage 鲁54 Lu 54 豫早棉9110 Yuzaomian 9110 测定值 Observed value 模拟值 Simulated value 误差 Error 测定值 Observed value 模拟值 Simulated value 误差 Error 苗期 Seedling stage 1.3500 1.4292 0.0560 1.2800 1.3045 0.0173 盛蕾期Peak squaring stage 0.9200 0.7979 0.0863 0.9300 0.7658 0.1161 盛花期Peak flowering stage 0.5800 0.5262 0.0381 0.6265 0.5833 0.0305 盛铃期Peak boll setting stage 0.4000 0.4363 0.0257 0.4734 0.4853 0.0084 吐絮期Boll opening stage 0.3800 0.4167 0.0259 0.4181 0.4473 0.0207 RMSE 0.1296 0.1383 n-RMSE 17.8504% 18.5447%