养分循环再利用  Use of recycled nutrients; Application of recycled nutrients

分批再循环培养  batch recycle culture; batch recycle cultivation

农田养分循环  Farmland nutrient balance

森林养分循环  forestry nutrient cycle

生物养分循环  Biological nutrient cycling

土壤养分循环  soil nutrient circulation; nutrient cycling; Soil nutrient cycling

土壤—作物系统养分循环  circulation of nutrients of soil-crop system

养分循环  Nutrient recycling; nutrient circle; nutrient cycling; Nutrient cycle; nutrition recycle; nutrient-resorption proficiency; Nutrient cycli; Nutrients cycling; cycling; cricalation; Reddish paddy soil; Nutrients cycle

养分循环利用  Nutrient cycling and utilization; recycling of nutrients; Use of recycled nutrients; Nutrient recycling and reutilization

养分循环平衡  nutrient cycling and balance

养分循环特征  Nutrient cycling characteristics

养分循环与平衡  nutrient cycling and balance

有机养分循环利用  cycling of organic nutrient

封闭式循环养殖系统  closed recirculating system; closed recirulating system

海水循环养殖系统  recirculating mariculture system

区域养分分配  Nutrients distribution in various zones

水分养分运移  dynamics of water and nutrient

水体循环养殖  Circulating aquaculture

土壤养分分布  soil nutrient distribution