不同产量水平稻茬小麦氮素需求特征研究
|
杜宇笑, 李鑫格, 王雪, 刘小军, 田永超, 朱艳, 曹卫星, 曹强
|
Nitrogen demand characteristics with different grain yield levels for wheat after rice
|
Yu-Xiao DU, Xin-Ge LI, Xue WANG, Xiao-Jun LIU, Yong-Chao TIAN, Yan ZHU, Wei-Xing CAO, Qiang CAO
|
|
表3 不同产量水平样本描述性统计分析
|
Table 3 Descriptive statistical analysis of samples at different yield levels
|
|
产量水平 Yield level (t hm-2) | 样本容量Sample size | 平均值Mean | 标准差 SD | 最小值 Min. | 25%分位25% Q | 中间值 Median | 75%分位 75% Q | 最大值 Max. | 低产<4.5 Low yield <4.5 | 26 | 3.5 | 0.5 | 2.7 | 3.0 | 3.5 | 4.0 | 4.5 | 4.5≤中低产<6.0 4.5≤low-middle yield <6.0 | 33 | 5.3 | 0.4 | 4.5 | 5.0 | 5.4 | 5.7 | 6.0 | 6.0≤中产<7.5 6.0≤ middle yield <7.5 | 64 | 6.9 | 0.4 | 6.1 | 6.6 | 6.9 | 7.2 | 7.5 | 高产≥7.5 High yield ≥7.5 | 48 | 8.1 | 0.4 | 7.5 | 7.8 | 8.1 | 8.5 | 9.1 | 总计 Total | 171 | 6.4 | 1.6 | 2.7 | 5.4 | 6.7 | 7.6 | 9.1 |
|
|
|