土壤侵蚀对坡耕地生产力影响的微区模拟试验
通过红壤旱坡地铲土覆土微区试验,模拟土壤侵蚀对坡耕地生产力的影响。结果表明,覆土厚度与玉米籽粒产量、秸秆产量呈极显著正相关,表明随着坡耕地表土冲刷损失数量的增加,玉米籽粒和秸秆产量极显著减产。铲除耕作层熟化表土15 cm,玉米减产29.62%;铲除耕作层熟化表土10 cm,玉米减产17.31%;铲除耕作层熟化表土5 cm,玉米减产12.69%;覆土耕作层熟化表土5 cm,玉米增产10.00%;覆土耕作层熟化表土10 cm,玉米增产15.77%;覆土耕作层熟化表土15 cm,玉米增产17.69%。...
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| Published in | 西南农业学报 Vol. 25; no. 4; pp. 1343 - 1346 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
云南省农业科学院农业环境资源研究所,云南昆明,650205%国际植物营养研究所成都代表处,四川成都,610066
2012
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4829 |
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| Summary: | 通过红壤旱坡地铲土覆土微区试验,模拟土壤侵蚀对坡耕地生产力的影响。结果表明,覆土厚度与玉米籽粒产量、秸秆产量呈极显著正相关,表明随着坡耕地表土冲刷损失数量的增加,玉米籽粒和秸秆产量极显著减产。铲除耕作层熟化表土15 cm,玉米减产29.62%;铲除耕作层熟化表土10 cm,玉米减产17.31%;铲除耕作层熟化表土5 cm,玉米减产12.69%;覆土耕作层熟化表土5 cm,玉米增产10.00%;覆土耕作层熟化表土10 cm,玉米增产15.77%;覆土耕作层熟化表土15 cm,玉米增产17.69%。 |
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| Bibliography: | Soil erosion; Productivity of sloping land; Simulated micro-plot experiment 51-1213/S A simulated micro-plot experiment,using soil removal or overlying in red soil slope to examine effect of soil erosion on productivity of sloping land,was conducted on upland at Gaocang Village of Kunming in 2008.The results showed that there were extremely remarkable positive correlation between thicknesses of top soil removal or overlying and corn yield,and the same as the straw yields.It was clear that with the increase in the loss of topsoil erosion in sloping land,maize grain and straw yield was significantly cut.The corn yields were decreased by 29.62 % when 15 centimeters of top soil was removed,and 17.31 % of corn was lost while 10 centimeters of top soil was removed away,and the corn yields were reduced by 12.69 % under 5 centimeters top soil loss.In another hand,the corn yields were increased by 10.00 %,15.77 % and 17.69 % under 5,10,15 cm top soil overlying,respectively. GUO Yun-zhou,TU Shi-hua,LIU Jian-xiang,JIA Qiu- |
| ISSN: | 1001-4829 |