|
| Effects of cross slope ridge cultivation and straw mulching on nitrogen and phosphorus loss in red soil slope farmland |
| Received:November 03, 2021 |
| View Full Text View/Add Comment Download reader |
| KeyWord:straw mulching;nitrogen and phosphorus loss;cross ridge cropping;runoff;red soil |
| Author Name | Affiliation | E-mail | | CHENG Peng | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | LIAO Chaolin | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | XIAO Qiliang | Hunan Institute of AgroEnvironment and Ecology/Key Laboratory of Agro-Environment in Midstream of Yangtze Plain/Dongting Lake Agricultural Non-point Source Pollution Control Technology Research Center, Ministry of Agriculture and Rural Affairs, Changsha 410125, China | | | PENG Hua | Hunan Institute of AgroEnvironment and Ecology/Key Laboratory of Agro-Environment in Midstream of Yangtze Plain/Dongting Lake Agricultural Non-point Source Pollution Control Technology Research Center, Ministry of Agriculture and Rural Affairs, Changsha 410125, China | | | JIAN Yan | Hunan Institute of AgroEnvironment and Ecology/Key Laboratory of Agro-Environment in Midstream of Yangtze Plain/Dongting Lake Agricultural Non-point Source Pollution Control Technology Research Center, Ministry of Agriculture and Rural Affairs, Changsha 410125, China | | | XU Aiping | Nanxian County Bureau of Agriculture and Rural Areas, Hunan Province, Nanxian 413200, China | | | ZHU Jian | Hunan Institute of AgroEnvironment and Ecology/Key Laboratory of Agro-Environment in Midstream of Yangtze Plain/Dongting Lake Agricultural Non-point Source Pollution Control Technology Research Center, Ministry of Agriculture and Rural Affairs, Changsha 410125, China | 312884550@qq.com |
|
| Hits: 2344 |
| Download times: 1728 |
| Abstract: |
| To study the response mechanism of surface runoff loss of nitrogen（N）and phosphorus（P）nutrients during rapeseed and maize rotation using different tillage methods in red sloping farmland located in southern China, the field positioning test was used to examine the effects of slope ridge cultivation（CK）, cross slope ridge cultivation（T1）, cross slope ridge cultivation + straw mulching（T2）, and along slope ridge cultivation + straw mulching（T3）on the surface runoff loss of N and P for two consecutive years. The total surface runoff of N and P with different treatments decreased in the order of CK > T3 > T1 > T2. T2 could effectively reduce the surface runoff of sloping farmland and N and P levels in the runoff. T2 had the best effect on controlling surface runoff and N and P. Compared with other treatments, the total loss of N and P in T2 decreased by 24.46%~74.90%, 39.60%~86.37% and 36.84%~79.66%, respectively. The N loss of slope farmland was mainly nitrate nitrogen（NO3--N）. Total N concentration and NO3--N concentrations in different treatments had a significant positive correlation. T2 had the best effects on diminishing the loss of soil N and P. During the observation period, total contents of soil N and P increased by 19.42% and 21.98% respectively. Therefore, promoting conservation tillage measures of T2 reduces the risk of N and P runoff loss and improves the sustainable production capacity on red soil slope farmland in southern China. |
|
|
|
