| Effects of oat and common vetch intercropping and fertilization on forage yield and quality in Horqin Sandy Land |
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| DOI：10.7606/j.issn.1000-7601.2023.06.19 |
| Key Words: intercropping fertilization oat common vetch yield quality Horqin sandy land |
| Author Name | Affiliation | | YANG Jinhu | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | LI Lijun | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | ZHANG Yanli | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | HAN Dongyu | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | HAN Li | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | ZHAO Xinyao | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | LUO Suju | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China | | ZHANG Hongjie | College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010019, China |
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| Abstract: |
| This experiment was conducted at the Northwest Naiman Desertification Research Station, Chinese Academy of Sciences in 2020 and 2021. The subjects were oat and common vetch, and a two\|factor randomized block design was adopted for multiple cropping of oats after mow\|cutting at the grain\|filling stage. There were 3 planting modes of single cropping oat (SO), single cropping common vetch (SV) and oat and common vetch intercropping (IOV). The fertilization factors included 4 levels of no fertilization (N), only chemical fertilizer (C), only microbial organic fertilizer (M) and microbial organic fertilizer and chemical fertilizer combined (G). The pass test forage yield and nutritional quality and the indexes related to interspecific competition were analyzed to determine the effects of intercropping and fertilization on the forage yield and nutritional quality of the multiple cropping oat and common vetch. The results showed that the aboveground biomass of oats and common vetch was increased by intercropping and fertilization. Under the G treatment, the dry yield of intercropping oat (IO) and intercropping common vetch (IV) was increased 4.34%, 1.79% and 27.63%, 34.12% respectively when compared with the corresponding monoculture. The land equivalent ratio of the intercropping was greater than 1, indicating that the intercropping oat and common vetch had a land use advantage. Meanwhile, the increase of common vetch yield was found to play an important role in the intercropping advantage through the analysis of the inter\|specific competition indicators. The contents of crude protein and crude fat in IO-G treatment were compared with the corresponding monoculture respectively increased 24.81%, 36.60% and 20.21%, 6.15%. The soluble sugar content in IV-G treatment was respectively increased by 18.55% and 34.36% compared with IV-N treatment. The contents of neutral detergent fiber and acid detergent fiber under IO-G treatment were 6.47% and 12.10% lower than those under the same level single cropping oat. The relative feeding value of intercropping oat and intercropping common vetch under G treatment was respectively increased by 39.18%, 58.81% and 25.68%, 55.46% compared with N treatment. Intercropping mode also promoted the increase of potential dry matter intake, digestible dry matter and metabolizable energy content of forage, which improved the nutrient quality of forage from energy accumulation to palatability. Based on the above index analysis, the nutritional quality and yield of forage could be improved by the combined application of microbial organic fertilizer and chemical fertilizer combined under oat and common vetch intercropping in sandy soil areas of eastern Inner Mongolia. |
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