氮管理对冬小麦产量和品质影响的整合分析

邓丽娟,焦小强

A Meta-Analysis of Effects of Nitrogen Management on Winter Wheat Yield and Quality

DENG LiJuan,JIAO XiaoQiang

表1 施氮对小麦产量和籽粒蛋白质含量效应数据库解释变量分类分组

Table 1 Classification and grouping of explanatory variables for effects of N application on wheat yield and grain protein concentration database

解释变量 Categorical explanatory variable 分组 Group 氮肥施用量 N fertilizer rate (kg·hm-2) ≤100; 100-150; 150-200; 200-250; 250-300; >300 基追比 Dressing ratio 全基施All base; <1; =1; 1-2; ≥2; 全追施All topdressing 对照组产量 Wheat yield of CK (t·hm-2) ≤3; 3-4; 4-5; 5-6; 6-7; 7-8; >8 对照组蛋白质含量 Grain protein concentration of CK (%) ≤10; 10-12; 12-14; >14 有机质含量SOM (g·kg-1) ≤10; 10-20; >20 全氮含量TN (g·kg-1) ≤1; 1-1.5; >1.5 碱解氮含量AN (mg·kg-1) ≤60; 60-90; >90 速效磷含量AP (mg·kg-1) 5-10; 10-20; >20