| The effects of grass-legume mixing farming on forage nutritional quality and soil nutrient in alpine zone of Tibet |
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| DOI：10.7606/j.issn.1000-7601.2021.02.19 |
| Key Words: grass-legume mixture forage nutritional quality soil nutrient alpine zone of Tibet |
| Author Name | Affiliation | | ZHOU Juanjuan | State Key Laboratory of Highland Barley and Yak Germplasm Resources and Genetic Improvement, Institute of Pratacultural Science, Lhasa, Xizang 850009, China
Tibet Academy of Agriculture and Animal Husbandry Science, Lhasa, Xizang 850009, China | | BAIMA Gaweng | State Key Laboratory of Highland Barley and Yak Germplasm Resources and Genetic Improvement, Institute of Pratacultural Science, Lhasa, Xizang 850009, China
Tibet Academy of Agriculture and Animal Husbandry Science, Lhasa, Xizang 850009, China | | WEI Wei | State Key Laboratory of Highland Barley and Yak Germplasm Resources and Genetic Improvement, Institute of Pratacultural Science, Lhasa, Xizang 850009, China
Tibet Academy of Agriculture and Animal Husbandry Science, Lhasa, Xizang 850009, China | | DE Kejia | Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, Qinghai 810016, China |
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| Abstract: |
| The forage yield, soil nutrients, and variation of soil nutrition were compared by monocultures of Avena sativa, Vicia sativa, Pisum arvense, and combination of A. sativa + V. sativa and A. sativa + P. arvense mixed patterns to explore the effects of soil amelioration while ensuring the performance of forage production in Maizhokunggar Sibu pasture of Tibet in 2019. The results showed that: (1) The hay yield of mixed sowing ratio of A. sativa∶V. sativa at 70%∶30%, and A. sativa∶P. arvense at 50%∶50% were the highest, which increased by 11.8% and 28.0% compared to monocultures of A. sativa, and increased by 24.5% and 17.4% compared to monocultures of A. sativa and P. arvense, respectively. (2) The crude protein (CP) of monocultures of V. sativa and P. arvense were 19.29% and 15.74%, respectively. The CP content of mixed sowing treatments showed a decreasing trend with increasing A. sativa sowing ratio, and the highest decreasing amplitude was 54.48% and 57.12%, respectively; while the neutral detergent fiber (NDF) and acid detergent fiber (ADF) showed the opposite trend. (3) The content of soil organic matter, total nitrogen (N), alkali-decomposed N, available phosphate (P), and available potassium (K) of monocultures of A. sativa were reduced by 1.10, 0.03 g·kg-1, and 22.93, 3.27, 4.38 mg·kg-1, respectively, compared with that in the monocultures of A. sativa. Increasing sowing rate of legume effectively improved the soil nutrients. The content of soil organic matter, total N, alkali-decomposed N, and available P were increased by 4.5%, 9.1%, 3.6%, and 6.1%, respectively, which improved the supply of available nutrients such as alkali-decomposed N and available P. In summary, grass-legume mixture is beneficial to the purpose of increasing forage production and conservation of cultivated land. |
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