The two black stone walls are set into the earth. rendzina like brown soil 这两堵黑石墙置入地下,黑色石灰土状棕色土
Effect of slow-releasing nitrogen fertilizers on CH_4 and N_2O emission in maize and rice fields in black earth soil 长效氮肥施用对黑土水旱田CH4和N2O排放的影响
Based on the black earth, the change and balance of soil OM and Nitrogen in different treatments was presented in the paper. 以国家黑土肥力与肥料效益监测基地为平台,针对不同施肥措施,研究了土壤有机质及氮素含量的年际动态变化与平衡。
It analyzes the situation of soil erosion in black earth area and the appraisal of potential hazard degree, which provide references for comprehensive administration of soil erosion. 通过对黑土区重点治理区坡耕地侵蚀现状和潜在危险程度的分析评价,以期为相关区域的水土保持综合治理提供可资借鉴的技术依据。
The article first proposes some ecological environment questions which are caused by the cultivated land development from the qualitative angle, mainly including soil erosion, the black earth degenerates, wilderness expansion, the soil and the water body pollution, the biodiversity sharp decline. 文中首先从定性的角度提出了一些主要由于耕地开发而引起的生态环境问题,包括水土流失、黑土退化、荒漠化扩展、土壤及水体污染、生物多样性锐减等。
The black earth organic archery target soil profile vertical distribution characteristic is, at the soil mantle organic matter accumulation, the content is high, the surface layer following presents the drop the tendency, presents the consistent tendency in the black earth zones of different. 黑土有机质的土壤剖面垂直分布特点是,在土壤表层有机质聚集、含量较高,表层以下呈现下降的趋势,在黑土的不同区域都呈现一致的趋势。