QQ客服 官方微博 反馈留言

浏览/检索结果: 共3条，第1-3条 帮助 限定条件 发表日期：2020     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Chemical multi-fingerprinting of exogenous ultrafine particles in human serum and pleural effusion 期刊论文 NATURE COMMUNICATIONS, 2020, 卷号: 11, 期号: 1, 页码: 1-11 作者:  Lu, Dawei;  Luo, Qian;  Chen, Rui;  Zhuansun, Yongxun;  Jiang, Jie 收藏  |  浏览/下载：25/0  |  提交时间：2021/09/14 Labor productivity of small-scale agriculture and its influence on agricultural landscape conservation in mountainous areas in China: a case study of rice farming in Hani terraced region 期刊论文 ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2020, 页码: 12 作者:  Zhang, Yongxun;  He, Lulu;  Liu, Longteng;  Min, Qingwen 收藏  |  浏览/下载：18/0  |  提交时间：2021/03/23 Labor productivity  Hani terraces  Globally Important Agricultural Heritage Systems (GIAHS)  Terraced landscape  Livelihood strategy   Analysis of the economic driving force for protecting Important Agricultural Heritage Systems based on the return rate on labor input:A case study of the Kuancheng Traditional Chestnut Cultivation System in Hebei Province 期刊论文 Chinese Journal of Eco-Agriculture, 2020, 卷号: 28, 期号: 9, 页码: 1405 作者:  He LL(何璐璐);  Zhang YX(张永勋);  Hong CC(洪传春);  Min QW(闵庆文) 收藏  |  浏览/下载：6/0  |  提交时间：2021/03/16 Farmer household's rate of return on labor input  Kuancheng Traditional Chestnut Cultivation System in Hebei Province  Important Agricultural Heritage Systems (IAHS)  China Nationally Important Agricultural Heritage Systems (China-NIAHS)  Small-scale agriculture  农户劳动投入回报率  宽城传统板栗栽培系统  重要农业文化遗产(IAHS)  中国重要农业文化遗产(China-NIAHS)  小规模农业