Effects of Fertilization and Mixed Sowing on Soil Nutrients and Pasture Yield of Degraded Grassland in Songnen Plain
Journal Title: Bulletin of Soil and Water Conservation - Year 2023, Vol 43, Issue 1
Abstract
[Objective] The effects of fertilization and mixed sowing on soil nutrients and pasture yield of degraded grassland in the Songnen Plain, Western Heilongjiang Province were studied, in order to provide a scientific basis for restoration of natural degraded grassland in local area. [Methods] The study was conducted on a natural lightly degraded grassland in the Songnen Plain of Western Heilongjiang Province. Astragalus adsurgens and Elymus dahuricus were used as reseeding grasses. Treatments consisted of two interrow mixed sowing ratios 〔legume:grass ratio 2∶2 (B1) and 1∶2 (B2)〕,and six nitrogen, phosphorus, and potassium application rate combinations: N50 P40 K45 (A1), N100 P240 K225 (A2), N150 P0K180 (A3), N200 P120 K0(A4), N250 P80 K270 (A5), and N300 P200 K90 (A6), where subscripts after each element indicated the application rate given as kg/hm2 N, P2O5, and K2O, respectively. [Results] Fertilization significantly improved available nutrients and pasture yield based on the ratio of mixed sowing. Soil nutrient changes in the surface soil layer (0—10 cm) were more affected by fertilization and mixed sowing than in the deeper layer (20—30 cm). Fertilization, mixed sowing, and their interaction had significant effects on the content of available soil nitrogen (p<0.05). The variation trends of available nitrogen and available phosphorus in the 0—10 cm soil layer were basically consistent with the additions of nitrogen and phosphorus. The contents of total nitrogen, available nitrogen, and available phosphorus in the 0—10 cm soil layer of legume-grass mixture in the 1∶2 ratio were greater than in the 2∶2 ratio at the same fertilization level. The productivity of the high nitrogen treatment (A6) was significantly (p<0.05) greater than that of the other treatments. The greatest aboveground biomass values were observed for the legume-grass 2∶2 ratio + N150 P0K180 treatment combination (290.68 g/m2) and for the legume-grass 1∶2 ratio + N300 P200 K90 treatment combination (254.31 g/m2). [Conclusion] Considering pasture yield and changes in soil nutrients, the legume-grass mixed sowing in the 2∶2 ratio and the fertilizer application rate of 150 kg/hm2 for nitrogen can be recommended.
Authors and Affiliations
Yufeng Fang, Zhiwei Cao, Hongsheng Sun, Qin Han, Dunliang Yan, Baoyang Wen, Xiubin Ren
Keywords
Related Articles
- EP ID EP762458
- DOI 10.13961/j.cnki.stbctb.2023.01.003
- Views 21
- Downloads 0
Water Quality and Spatial-temporal Variation Characteristics from Main Stream and Main Tributaries of North River
[Objective] The water quality of the main stream and main tributary monitoring sections of the North River in 2020 was analyzed in order to provide a reference and basis for monitoring and protecting the water environmen...
Impacts of Slope Type and Ecological Factors on Vegetation Restoration at DG Hydropower Station in Xizang Autonomous Region
[Objective] The slope vegetation restoration effect and dominant ecological factors in the working area of DG hydropower station in Xizang Autonomous Region were studied in order to provide a theoretical basis and techni...
Water Use Strategies of Typical Plants in a Tunnel Construction Area at Eastern Margin of Qinghai-Xizang Plateau
[Objective] The water use characteristics of plants and their responses to environmental changes in a tunnel construction area at the eastern margin of Qinghai-Xizang Plateau were studied in order to provide a reference...
Stability Assessment of Hesigewula Open-pit Coal Mine Based on Geomorphic Information Entropy of Watershed System
[Objective] The stability evaluation of an open-pit mining area was carried out in order to provide technical support for landform remodeling, ecological environment restoration, and soil erosion monitoring in a mining a...
Allocation Efficiency of Land and Water Resources for Grain Production and Its Influencing Factors in China
[Objective] The objective of this study was to determine the efficiency of land and water resource allocation in grain production of China and its influencing factors in order to provide theoretical support for ensuring...