Taking an example of Majiayu Catchment Area (14.15 ha) in Taoyuan County of HunanProvince, the soil and water resources dynamics, fertility evolution characteristics andland productivity changing situation were studie...Taking an example of Majiayu Catchment Area (14.15 ha) in Taoyuan County of HunanProvince, the soil and water resources dynamics, fertility evolution characteristics andland productivity changing situation were studied. Fixed observation results from 1993to 2002 showed that pools covering about 15% of total area could store up 10% of surfacerunoff, keep 78.1% of eroded soil and 65.4% of lost nutrients. The yearly ratio ofinterception and evapotranspiration in land, storage in pools and drainage was 7:2:1,which ensured the resources and nutrients equilibrium and a benign recycle in thecatchment area system, and benefited the aquatic culture and helped to resist seasonaldrought. Moreover, the results showed that soil erosion modulus decreased significantly,equal to or lower than soil loss tolerance (≤500 tkm-2) in reddish yellow soil regions.Soil organic matter, total and available N content in sloping land, dryland and paddyfield increased steadily (>10%); water storage enhanced by more than 20% in sloping landand dryland in drought season; crop production increased by more than 20%; and productionof trees, fruits, tea and fish as well as land productivity increased yearly.展开更多
[Objective] The paper was to construct soil erosion control and circular agriculture mode in hilly red soil of southern China, and analyze its application effort. [Method] The cause of soil erosion in hilly red soil o...[Objective] The paper was to construct soil erosion control and circular agriculture mode in hilly red soil of southern China, and analyze its application effort. [Method] The cause of soil erosion in hilly red soil of southern China and the reason for long-term treatment without remarkable effort were analyzed. On this basis, the key technology, economic benefit, ecological service function and carbon sequestration sink enhancement effect of various modes were further analyzed. [Result] The basic idea for comprehensive control of hilly soil erosion in southern China was as follows: the control of soil erosion was combined with modern agricultural production, in order to build "fruit(tea)-grass-livestock-methane" circular agriculture mode with comprehensive control of soil erosion; application effect analysis showed that the establishment of circular agriculture mode in southern hilly area to control soil erosion had remarkable effect, which could simultaneously meet the coordinated development of ecological, economic and social benefits. [Conclusion] This study established an effective mode suitable for soil erosion control and agricultural protection development in southern red soil mountain, which could drive the sustainable development of ecological restoration of mountainous area and rural agricultural economy.展开更多
The effects of soil and water conservation （SWC） on soil properties are well documented. However, definitive and quantitative information of SWC and its interactions with soil properties on soil productivity is lack...The effects of soil and water conservation （SWC） on soil properties are well documented. However, definitive and quantitative information of SWC and its interactions with soil properties on soil productivity is lacking for hilly red soil region of southern China. Experiments were conducted in the hilly red soil region of southern China for seven years in three rtmoffplots, each of which represented different SWC forest-grass measures. Principal component analysis and multiple regression techniques were used to relate the aboveground biomass （representing soil productivity） to soil properties. Based on the final regression equations, soil organic carbon content （Sot） is significantly correlated with soil productivity under the condition of forest-grass measures, whereas pH value and cation exchange capacity （Cee） are the main factors for soil productivity without SWC. Therefore, SWC plays an important role in sequestering Soc and improving soil productivity.展开更多
提高补充耕地质量是实施区域耕地占补平衡的重要保障。为全面了解杭州市余杭区新垦耕地的质量状况及其针对性地提出新垦耕地的改良措施,本文采用田间调查与采样分析相结合的方法,把区内2012~2014年建成的天目山东麓347.83 hm2新垦红壤...提高补充耕地质量是实施区域耕地占补平衡的重要保障。为全面了解杭州市余杭区新垦耕地的质量状况及其针对性地提出新垦耕地的改良措施,本文采用田间调查与采样分析相结合的方法,把区内2012~2014年建成的天目山东麓347.83 hm2新垦红壤耕地划分为72个评价单元,开展了新垦耕地肥力的全面调查,并按照《浙江省耕地质量评定与地力分等定级技术规范》对耕地地力进行了综合评价。结果表明,区内新垦红壤耕地普遍存在"砂"、"酸"、"瘦"和"生"等限制因素,耕层土壤质地为砂土的耕地占比达56.88%,土壤呈强酸性的耕地占比高达86.35%,有机质含量在20 g kg-1以下的耕地占70.43%。总体上,耕地地力在中下水平,多属于二等4级和三等5级。分析认为立地条件较差是导致新垦红壤耕地地力偏低的主要原因。施用碱性改良剂降低土壤酸度和加强以提升有机质为核心的土壤培肥管理是该区新垦红壤耕地质量提升的重要举措。展开更多
基金funded by the Knowledge Innovation Program of Chinese Academy of Sciences(KZCX2-SW-415,KZCX3-SW-426).
文摘Taking an example of Majiayu Catchment Area (14.15 ha) in Taoyuan County of HunanProvince, the soil and water resources dynamics, fertility evolution characteristics andland productivity changing situation were studied. Fixed observation results from 1993to 2002 showed that pools covering about 15% of total area could store up 10% of surfacerunoff, keep 78.1% of eroded soil and 65.4% of lost nutrients. The yearly ratio ofinterception and evapotranspiration in land, storage in pools and drainage was 7:2:1,which ensured the resources and nutrients equilibrium and a benign recycle in thecatchment area system, and benefited the aquatic culture and helped to resist seasonaldrought. Moreover, the results showed that soil erosion modulus decreased significantly,equal to or lower than soil loss tolerance (≤500 tkm-2) in reddish yellow soil regions.Soil organic matter, total and available N content in sloping land, dryland and paddyfield increased steadily (>10%); water storage enhanced by more than 20% in sloping landand dryland in drought season; crop production increased by more than 20%; and productionof trees, fruits, tea and fish as well as land productivity increased yearly.
文摘[Objective] The paper was to construct soil erosion control and circular agriculture mode in hilly red soil of southern China, and analyze its application effort. [Method] The cause of soil erosion in hilly red soil of southern China and the reason for long-term treatment without remarkable effort were analyzed. On this basis, the key technology, economic benefit, ecological service function and carbon sequestration sink enhancement effect of various modes were further analyzed. [Result] The basic idea for comprehensive control of hilly soil erosion in southern China was as follows: the control of soil erosion was combined with modern agricultural production, in order to build "fruit(tea)-grass-livestock-methane" circular agriculture mode with comprehensive control of soil erosion; application effect analysis showed that the establishment of circular agriculture mode in southern hilly area to control soil erosion had remarkable effect, which could simultaneously meet the coordinated development of ecological, economic and social benefits. [Conclusion] This study established an effective mode suitable for soil erosion control and agricultural protection development in southern red soil mountain, which could drive the sustainable development of ecological restoration of mountainous area and rural agricultural economy.
基金Project(40971170) supported by the National Natural Science Foundation of ChinaProject(NCET-09-330) supported by the Program for New Century Excellent Talents in University of China
文摘The effects of soil and water conservation （SWC） on soil properties are well documented. However, definitive and quantitative information of SWC and its interactions with soil properties on soil productivity is lacking for hilly red soil region of southern China. Experiments were conducted in the hilly red soil region of southern China for seven years in three rtmoffplots, each of which represented different SWC forest-grass measures. Principal component analysis and multiple regression techniques were used to relate the aboveground biomass （representing soil productivity） to soil properties. Based on the final regression equations, soil organic carbon content （Sot） is significantly correlated with soil productivity under the condition of forest-grass measures, whereas pH value and cation exchange capacity （Cee） are the main factors for soil productivity without SWC. Therefore, SWC plays an important role in sequestering Soc and improving soil productivity.
文摘提高补充耕地质量是实施区域耕地占补平衡的重要保障。为全面了解杭州市余杭区新垦耕地的质量状况及其针对性地提出新垦耕地的改良措施,本文采用田间调查与采样分析相结合的方法,把区内2012~2014年建成的天目山东麓347.83 hm2新垦红壤耕地划分为72个评价单元,开展了新垦耕地肥力的全面调查,并按照《浙江省耕地质量评定与地力分等定级技术规范》对耕地地力进行了综合评价。结果表明,区内新垦红壤耕地普遍存在"砂"、"酸"、"瘦"和"生"等限制因素,耕层土壤质地为砂土的耕地占比达56.88%,土壤呈强酸性的耕地占比高达86.35%,有机质含量在20 g kg-1以下的耕地占70.43%。总体上,耕地地力在中下水平,多属于二等4级和三等5级。分析认为立地条件较差是导致新垦红壤耕地地力偏低的主要原因。施用碱性改良剂降低土壤酸度和加强以提升有机质为核心的土壤培肥管理是该区新垦红壤耕地质量提升的重要举措。
