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地膜覆盖对土壤氮素矿化的影响
学位论文
硕士, 兰州: 兰州大学, 2017
Authors:
宋文元
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Submit date:2019/01/17
地膜覆盖
土壤水分
氮素矿化
土壤无机氮
地膜覆盖对半干旱区玉米地土壤氮素循环和肥料氮去向的影响
学位论文
博士, 兰州: 兰州大学, 2014
Authors:
刘小娥
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Submit date:2019/01/17
地膜覆盖
土壤温度
土壤水分
氨挥发
土壤氮素矿化
土壤无机氮
肥料氮利用效率
肥料氮的去向
青藏高原高寒草甸不同放牧强度与施肥处理条件下土壤氮素矿化季节动态
学位论文
理学硕士, 兰州: 兰州大学, 2007
Authors:
杨玉民
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Submit date:2023/11/15
青藏高原
Qinghai-tibetan plateau
高寒草甸
alpine meadow
放牧强度
grazing intensity
施肥处理
fertilizationtreatment
氮素矿化
nitrogen mineralization
有效养分
effective nutrients
地上生物量
overground biomass