|
 |
研究报告目录 |
沙地影响玉米产量形成因子的量化研究(I) |
| ------------------------------------------------------------------------------------------ |
| 出 版 社：中国沙漠 |
| 发表时间：2000年S1期 |
| 台 站：
奈曼沙漠化研究站
|
| 作 者：张铜会 崔建垣 赵哈林 赵学勇 |
| 点 击 率：6845 |
| ------------------------------------------------------------------------------------------ |
| 关 键 字：玉米 水肥模型 科尔沁沙地 |
摘 要：采用二次回归通用旋转组合设计方法，对沙地玉米的水肥因子进行了量化试验研究。结果表明，试验条件下沙地农田当土壤相对含水量保持在67.2%，施用尿素52.5g/m2和施用磷肥36.7g/m2时，可以获得1.32kg/m2的最高产量。影响玉米产量形成的敏感因子首先是氮肥施用量，其次是土壤相对含水量，而磷肥施用量对玉米增产效果不明显。玉米的产量（Y）与土壤相对含水量因子（X1）、氮肥施用量因子（X2）和磷肥施用量因子（X3）的关系为：
Y=5.16+0.151x1+0.284x2-0.182x3+0.199x1x2+0.403x1x3-0.215x2x3-
0.193x12-0.415x22-0.002x32
|
| 关 键 字(英文)：spring corn mathematical model of water and fertilizers Horqin Sandy Land |
摘 要(英文)：The aim of this experiment designed by the general regressive methods of rotary combination for building a quadratic equation was try to investigate the relationship between the corn yield and the soil water content, the application amounts of nitrogen and phosphate. There were 20 treatment plots in total and each plot was 4m2. The results show that the amounts of nitrogen and the soil water content are the sensitive factors for increasing corn grain yield in sand cropland, but the phosphate taking a little role for it. If the soil water content, the amounts of N, the amounts of P is 67.5%, 55.7g/m2, 36.7g/m2, respectively, the highest corn yield will be 1.32kg/m2 under the experimental condition. A mathematical model composed of the soil water content (x1), the amounts of nitrogen (x2) and the amounts of phosphate (x3) is as follows
Y=5.16+0.151x1+0.284x2-0.182x3+0.199x1x2+0.403x1x3-0.215x2x3-
0.193x12-0.415x22-0.002x32
|
| ------------------------------------------------------------------------------------------ |
| null |
|
|
|
