| 全膜双垄沟播玉米对土壤全氮及全磷时空变化的影响 |
| |
| 引用本文： | 汪佳,黄高宝,李玲玲,方彦杰.全膜双垄沟播玉米对土壤全氮及全磷时空变化的影响[J].甘肃农业大学学报,2011,46(1):22-29. |
| |
| 作者姓名： | 汪佳 黄高宝 李玲玲 方彦杰 |
| |
| 作者单位： | 甘肃农业大学农学院,甘肃,兰州,730070 |
| |
| 摘 要： | 在田间试验条件下研究了全生育期玉米露地平作、半膜平作、全膜平作及全膜双垄沟播处理下0～200cm土层全氮与全磷的含量变化特征.结果表明:7～8月玉米全膜处理下40～60 cm土层氮吸收最强,全生育期全膜双垄沟播处理对110 cm以下土层氮影响最大;全膜双垄沟播处理全生育期20～40 cm处全磷含量下降幅度为0.255 ...
|
| 关 键 词： | 玉米 全膜双垄沟播 全氮 全磷 时空变化 |
Effects of completely mulched alternating narrow and wide ridges with furrow planting on spatial-temporal dynamics of total nitrogen and total phosphorous |
| |
| WANG Jia,HUANG Gao-bao,LI Ling-ling,FANG Yan-jie.Effects of completely mulched alternating narrow and wide ridges with furrow planting on spatial-temporal dynamics of total nitrogen and total phosphorous[J].Journal of Gansu Agricultural University,2011,46(1):22-29. |
| |
| Authors: | WANG Jia HUANG Gao-bao LI Ling-ling FANG Yan-jie |
| |
| Institution: | WANG Jia,HUANG Gao-bao,LI Ling-ling,FANG Yan-jie(College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China) |
| |
| Abstract: | Spatial-temporal dynamics of total soil nitrogen(TN) and total soil phosphorous(TP) in maize field under completely mulched alternating narrow and wide ridges with furrow planting(CMRF) were studied on field experiment.Changes of TN and TP contents in 0～200 cm soil layers under the treatments of CMRF,flat-planting with no mulching(NM),half-mulching and flat-planting(HM) and complete-mulching and flat-planting(CM) were studied.The results showed that nitrogen absorption was the greatest in 40～60 cm layer under complete-mulching treatments from July to August,CMRF greatly affected nitrogen contents in the soil layers deeper than 110 cm in the whole growth stage.TP of 20～40 cm soil layer decreased 0.255 g·kg-1 in the whole growth stage under CMRF,the decreasing was higher than those of other treatments.TP contents of 110～140 cm soil layer under each treatment showed a slow decreasing without regulation with the growth stage proceeding,the decreasing range under CMRF was the greatest(0.152 g·kg-1).Spatial trends of TN and TP exhibited an "S" line,the soil layers of TN and TP absorption under mulching treatments were deeper than those of no mulching treatment by 20～40 cm from July to August.The proportion of absorbed nitrogen in 0～60 cm soil layers was the highest under CMRF,while that of TP between each treatment had no significant difference.It was concluded that a root-friendly zone was provided under the mulching treatments for maize roots,the absorption to deeper nutrients was greatest under CMRF and the proportion of TP in 0～60 cm soil layers to that in the entire 200cm soil body had no significant difference under different mulching patterns. |
| |
| Keywords: | maize completely mulched alternating narrow and wide ridges with furrow planting total nitrogen total phosphorous spatial-temporal dynamics |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
