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| Effects of long-term application of organic manure on soil fertility and nitrate-N transport in fluvo-aquic soil |
| Received:March 09, 2017 |
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| KeyWord:organic manure;wheat-maize rotation;organic matter;available nutrients;nitrate leaching |
| Author Name | Affiliation | E-mail | | LI Yan | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China | | | SUN Cui-ping | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China | | | JING Yong-ping | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China | | | LUO Jia-fa | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
AgResearch, Ruakura Research Centre, Hamilton 3240, New Zealand | | | ZHANG Ying-peng | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China | | | ZHONG Zi-wen | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China | | | SUN Ming | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China | | | BO Lu-ji | Institute of Agricultural Resources and Environment, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China
Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China | | | LIU Zhao-hui | Key Laboratory of Agro-Environment in Huang-Huai-Hai Plain, Ministry of Agriculture, Ji'nan 250100, China
Shandong Provincial Key Laboratory of Agricultural Non-Point Source Pollution Control, Ji'nan 250100, China
Shandong Academy of Agricultural Sciences, Ji'nan 250100, China | liuzhaohuinky@163.com |
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| Abstract: |
| The environmental problems caused by long-term fertilization,especially groundwater pollution resulting from leaching of nitrate nitrogen (NO3--N),have received increasing attention.A long-term field experiment was established in an intensively cultivated alluvial soil in the North China Plain,where a wheat-maize rotation was practiced.Treatments included continuous application of mineral fertilizer (no organic manure application) and three durations of organic manure application with no mineral fertilizer (3,5,and 20 years).Changes in soil fertility,crop yield,and soil nitrate accumulation were explored.The results showed that the longer the period of continuous organic manure application,the more significantly the soil bulk density decreased and the soil nutrient content increased.The crop yield from the mineral fertilizer treatment was significantly higher than that from the organic manure treatments.The yield decreased as the number of organic manure application years increased,but there was no significant difference among the three organic manure treatments.In the soil profiles,it was shown that the NO3--N accumulation in the organic manure treatment was greater than that in the mineral fertilizer treatment.The NO3--N accumulation firstly decreased and then increased with increasing soil depth,and there was a positive relationship between NO3--N content and the number of organic manure application years.The amount of accumulated NO3--N in the 80~100 cm soil layer was up to 240 kg·hm-2 after 20 years of continuous organic manure application.Therefore,continuous application of organic manure could reduce crop yield and there is a definite risk of nitrate leaching after 20 years of organic manure application.More research is required to develop measures to increase crop yield,alleviate the accumulation of NO3--N,and prevent nitrate pollution of groundwater when continuously applying organic manure. |
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