Aflakpui G K S, Vyn T J, Anderson G W, Clements D R, Hall M R, Swanton C J. 1994. Crop management systems for corn (Zea mays) following established alfalfa (Medicago sativa). Canadian Journal of Plant Science, 74, 255–259.

Animal Husbandry and Veterinary Bureau, Ministry of Agriculture and Rural Affairs and National Animal Husbandry Service Station. 2022. China Grass Industry Statistics. China Agriculture Press, Beijing. (in Chinese)

Chang S J, Liu N, Wang X Y, Zhang Y J, Xie Y. 2012. Alfalfa carbon and nitrogen sequestration patterns and effects of temperature and precipitation in three agro-pastoral ecotones of northern China. PLoS ONE, 7, e50544.

Chen S P, Wang W T, Xu W T, Wang Y, Wan H W, Chen D M, Tang Z Y, Tang X L, Zhou G Y, Xie Z Q, Zhou D W, Shangguan Z P, Huang J H, He J S, Wang Y F, Sheng J D, Tang L S, Li X R, Dong M, Wu Y, et al. 2018. Plant diversity enhances productivity and soil carbon storage. Proceedings of the National Academy of Sciences of the United States of America, 115, 4027–4032.

Cui Z L, Zhang H Y, Chen X P, Zhang C C, Ma W Q, Huang C D, Zhang W F, Mi G H, Miao Y X, Li X L, Gao Q, Yang J C, Wang Z H, Ye Y L, Guo S W, Lu J W, Huang J L, Lv S H, Sun Y X, Liu Y Y, et al. 2018. Pursuing sustainable productivity with millions of smallholder farmers. Nature, 555, 363–366.

Du S J, Zhang Y L, Zhang Z Y, Ji Y Z, Yin X, Han J, Zhang L J. 2021. Nitrogen use efficiency and fate of new urea types in a winter wheat-summer maize rotation system. Journal of Plant Nutrition and Fertilizers, 1, 24–34.

Ghose B. 2015. Food security and food self-sufficiency in China: From past to 2050. Food & Energy Security, 3, 86–95.

Gu B J, Duan J K, Ren C C, Wang S T, Wang C. 2021. Large-scale farming promotes agricultural green development in China. Journal of Agricultural Resources and Environment, 38, 709–715. (in Chinese)

Guo M Q, Liu L, Xing J Y, Yang G W, Zhang Y J. 2023. Species selection for no-tillage reseeding in grassland restoration based on plant-soil feedback. Acta Prataculturae Sinica, 32, 14−23. (in Chinese)

Jin S, Zhang B, Wu B, Han D, Hu Y, Ren C, Zhang C, Wei X, Wu Y, Mol A P J, Reis S, Gu B, Chen J. 2021. Decoupling livestock and crop production at the household level in China. Nature Sustainability, 4, 48–55.

Li L, Huang G, Zhang R, Cai L, Luo Z, Jin X, Zhang E, Bellotti B, Unkovich M. 2011. Effects of lucerne removal time on soil water and productivity in a lucerne-wheat rotation on the Western Loess Plateau. Acta Agronomica Sinica, 37, 686–693.

Liu H, Cui Y N, Zhong Y. 2023. New measures and prospect of ensuring feed grain supply by opening high levels and letting go. World Agriculture, 6, 25–36. (in Chinese)

Liu Y M. 2018. The troubles of the growth of dairy farming in China land for success, land for defeat. China Dairy, 11, 2–7. (in Chinese)

Lu X S. 2021.The Quality and quantity issues of alfalfa products development. China Dairy, 8, 9–12. (in Chinese)

Lv X Z, Wang C Z, Qiu X D, Yao G L, Xiao J N, Shi Y H, Zhu X Y. 2018. Effects of alfalfa meal on growth performance, serum biochemical indexes, carcass quality and economic benefit of finishing pigs. Chinese Journal of Animal Nutrition, 30, 1693–1702. (in Chinese)

National Bureau of Statistics of the People’s Republic of China 2022. China Statistical Yearbook. China Statistics Press. (in Chinese)

Pang J, Wang Y, Lambers H, Tibbett M, Siddique K H M, Ryan M H. 2013. Commensalism in an agroecosystem: Hydraulic redistribution by deep-rooted legumes improves survival of a droughted shallow-rooted legume companion. Physiologia Plantarum, 149, 79–90.

Pauferro N, Guimarães A P, Jantalia C P, Urquiaga S, Alves B J R, Boddey R M. 2010. 15N natural abundance of biologically fixed N2 in soybean is controlled more by the Bradyrhizobium strain than by the variety of the host plant. Soil Biology and Biochemistry, 42, 1694–1700.

Qi M F, Lou C H, Zhu X Y, Chen W X, Shi Y H, Wang C Z. 2018. Effects of different levels of alfalfa meal on productivity and reproductive performance of primiparous sows. Acta Prataculturae Sincia, 27, 158–170. (in Chinese)

Ren J Z, Hou F J. 1999. Change the traditional concept of food and try out food equivalence. Acta Pratacultural Sinica, S1, 3–5. (in Chinese)

Ren J Z, Nan Z B, Lin H L. 2005. Taking the grassland agro-system to insure food security. Acta Pratacultural Sinica, 3, 1–10. (in Chinese)

Renard D, Tilman D. 2019. National food production stabilized by crop diversity. Nature, 571, 257–260.

Shi Y H, Ma J X, Lu Z H, Liu B S, Wang Z C, Ciu Y L. 2024. Application of alfalfa replacing soybean meal diet in pig production. Feed Industry, 5, 1–6. (in Chinese)

Shi Z Z, Wang M L. 2021. Evolution and prospect of China’s forage industry policy. Chinese Journal of Grassland, 2, 107–114. (in Chinese)

Smith M A, Carter P R, Imholte A A. 1992. Conventional vs. no-till corn following alfalfa/grass: Timing of vegetation kill. Agronomy Journal, 5, 780–786.

Wang M L. 2023. Focusing on the expansion of pasture industry to ensure the high-quality development of livestock industry. Modern Agriculture, 6, 3–6

Wang X J, He Y P, Jiang H P. 2020. China’s food security during the tenth five-year Plan: Situation, problems and countermeasures. Reform, 9, 27–39. (in Chinese)

Wu M M, Li Y H. 2024. Breaking “alkali” to rebirth and upgrading the “pasture green”. Hebei Economic Daily. [2024-6-25]. https://hebei.hebnews.cn/2024–06/25/content_9198329.htm

Xu H, Qiao J L, Huang X F, Ji L L. 2022. Investigation on cultivated land problem. Economic Daily. [2022-2-14].http://paper.ce.cn/jjrb/html/2022-02/14/content_457991.htm

Xu R X, Zhang Y J. 2021. The application prospect of forage intercropping in the agricultural region. China Dairy, 8, 3–8. (in Chinese)

Xu R, Zhao H, Liu G, Li Y, Li S, Zhang Y, Liu N, Ma L. 2022. Alfalfa and silage maize intercropping provides comparable productivity and profitability with lower environmental impacts than wheat–maize system in the North China plain. Agricultural Systems, 195, 103305.

Xu R X, Zhao H M, Liu G B, You Y L, Ma L, Liu N, Zhang Y J. 2021. Effects of nitrogen and maize plant density on forage yield and nitrogen uptake in an alfalfa–silage maize relay intercropping system in the North China Plain. Field Crops Research, 263, 108068.

Xue Z, Wang Y, Palmer E, Zhang Y. 2023. Intercropping of orchardgrass and alfalfa improves soil fertility, forage yield, feeding values and land use efficiency while limiting ruminal greenhouse gas emissions. Grass and Forage Science, 78, 275–287.

Yang W J. 1998. Re-understanding of China’s grain problem. Zhejiang Social Sciences, 3, 79–84. (in Chinese)

Yang X, Ma J X, Huang W K, Lu J D, Niu J K, Zhang X X, Li S R, Cao S X, Wang Z C, Shi Y H. 2023. Effect of replacing soybean meal with alfalfa leaf meal on serum antioxidant level, immune function and reproductive performance of sows. Journal of Henan Agricultural University, 4, 615–622.(in Chinese)

You L C, Ros G H, Chen Y L, Shao Q, Young M D, Zhang F S, Vries W D. 2023. Global mean nitrogen recovery efficiency in croplands can be enhanced by optimal nutrient, crop and soil management practices. Nature Communications, 14, 5747.

Yu C Q. 2019. The coupled effects of water and nitrogen on China’s food and environmental securities. Scientia Sinica Terrae, 49, 19. (in Chinese)

Zhang H, Liu N, Wang Z J, Du J M, Wang L F, Mi Y X, Yu H Q, Xu H K, Zhang Y J. 2022. Grazing-livestock system productivity of legume-grass mixtures in the Loess Plateau of China. Pratacultural Science, 39, 1890–1903. (in Chinese)

Zhang X, Davidson E A, Mauzerall D L, Searchinger T D, Dumas P, Shen Y. 2015. Managing nitrogen for sustainable development. Nature, 528, 51–59.

Zhang X D, Lai B T, Fang Q, Lou L F, Wang X, Zhu L Y. 2010. Effect of alfalfa meal on intestinal flora in laying hens’ diet. Zhejiang Animal Husbandry Veterinarian, 35, 7–9. (in Chinese)

Zhang Y, Huang Y, Liu Y, Fan Y B, Peng J L, Tang Z, Xia C, Nan Z B. 2023. Strategic thinking on developing grassland agriculture to ensure food safety under the new situation. Chinese Journal of Engineering Science, 25, 73–80. (in Chinese)

Zhang Y J. 2019. Industrial development of forage crops in China. China Dairy, 4, 2–9. (in Chinese)

Zhang Y J, Yang G W, Liu N, Chang S J, Wang X Y. 2013. Review of grassland management practices for carbon sequstration. Acta Prataculturae Sinica, 22, 290–299. (in Chinese)

Zhang Y J, Zhou J Q, Yang G W, Jing J Y, Liu N. 2020, Theory and application of no-tillage reseeding in degraded grasslands. Chinese Science Bulletin, 65, 1546–1555. (in Chinese)

Zhou J Q, Wilson G W, Cobb A B, Yang G W, Zhang Y J. 2019. Phosphorus and mowing improve native alfalfa establishment, facilitating restoration of grassland productivity and diversity. Land Degradation and Development, 30, 647–657.

Zhou Y, Li X H, Liu Y S. 2021. Cultivated land protection and rational use in China. Land Use Policy, 106, 105454.

Zhu X Y, An Y, Liu Z K, Yan R R, Shao C L, Xu D W, Xu L J, Sun Z W, Wang D K, Zhang H F, Xin X P. 2023. Comparing ecological effect between traditional cropland and alfalfa grassland based on life cycle assessment. Acta Ecologica Sinica, 43, 9148–9163.