| Spatial and temporal changes of soil nutrients of spring maize field in the Loess Plateau under conservation tillage |
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| DOI：10.7606/j.issn.1000-7601.2010.06.13 |
| Key Words: conservation tillage soil nutrients spring corn Loess Plateau |
| Author Name | Affiliation | | ZHAO Rulang | Northvest A & F Universiy, Yangling，Shaanxi 712100, China | | LIU Pengtao | Northvest A & F Universiy, Yangling，Shaanxi 712100, China
National Agricultural Technology Extension and Service Center, Beijing 100125, China | | FENG Baili | Northvest A & F Universiy, Yangling，Shaanxi 712100, China | | ZHANG Xiaodong | Northvest A & F Universiy, Yangling，Shaanxi 712100, China | | MA Zhiqing | Northvest A & F Universiy, Yangling，Shaanxi 712100, China | | XUE Shaoping | Northvest A & F Universiy, Yangling，Shaanxi 712100, China | | CAI Xiaoqing | Farm of Protospecies Reproduction，Huangling County，Huangling， Shaanxi 727300, China | | LIU Yuexian | Farm of Protospecies Reproduction，Huangling County，Huangling， Shaanxi 727300, China |
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| Abstract: |
| Three kinds of farming measures were adopted, such as no tllage (NT), conventional tillage + straw returming (TS) and conventional tillage (CT), to study the effects of different tillage treatments on soil nutrient content of
spring maize field in the Loess Plateau for three consecutive years. The results show that soil organic matter content turns a rising trend under conservation tillage with the growing period, in which the soil organic matter content in arable layer was significantly higher than that under other two treatments; Conservation tillage makes the soil nitrogen enrichment up to the surface of soil; The available phosphorus is increasing slightly under conservation tillage , which is obvious in the harvest time and is significantly diferent from that under TS and CT treatments; The available potassium under conserva-tion tllage treatment is significantly lower than that under other treatments, but there is an increasing trend. |
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