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长江下游农区不同豆科绿肥作物生育进程·形态及产量性状比较 被引量:7
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作者 陈震 还静 +4 位作者 管永祥 吴桂成 吴正贵 刘芳 孙政国 《安徽农业科学》 CAS 2018年第30期149-151,154,共4页
[目的]探讨不同豆科绿肥作物的生育进程、形态及产量优势。[方法]采用露天盆栽模式,对紫花苜蓿、金花菜、紫云英、光叶紫花苕子、毛苕子、红三叶、白三叶、绛三叶8种豆科绿肥作物的生育进程、形态及产量性状进行研究。[结果]野豌豆属绿... [目的]探讨不同豆科绿肥作物的生育进程、形态及产量优势。[方法]采用露天盆栽模式,对紫花苜蓿、金花菜、紫云英、光叶紫花苕子、毛苕子、红三叶、白三叶、绛三叶8种豆科绿肥作物的生育进程、形态及产量性状进行研究。[结果]野豌豆属绿肥作物生物量最高,然后依次是苜蓿属、三叶草属、黄芪属。野豌豆属中光叶紫花苕子比毛苕子生长优势大,生物量较高;三叶草属中红三叶出苗快,早发性最好,当年生长盛花期鲜草产量最高。苜蓿属中金花菜与紫花苜蓿相比,出苗与冬前生长较快,鲜草产量较高。8种绿肥作物的生育期在180~241 d,最长的是紫花苜蓿,最短的是紫云英。[结论]结合生物量指标与生育进程,长江下游农区绿肥作物品种配置应重点选择野豌豆属,搭配选择苜蓿属、三叶草属。 展开更多
关键词 长江下游农区 豆科 绿肥作物 生育进程 产量
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The Four Stages in the Origin of Rice Agriculture
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作者 Zhao Zhijun 《Chinese Annals of History of Science and Technology》 2019年第1期1-20,共20页
In recent years,due to the widespread application of flotation,a large number of plant remains related to the origin of rice agriculture have been found in the middle and lower reaches of the Yangtze River.Through the... In recent years,due to the widespread application of flotation,a large number of plant remains related to the origin of rice agriculture have been found in the middle and lower reaches of the Yangtze River.Through the study of these new findings,it has been discovered that the origin of rice agriculture was a long and gradual process lasting for thousands of years.This process can be divided into four stages:the stage of gestation took place around 10,000 years ago—human society was still in the hunting and gathering phase,but archaeological evidence of human-used or even cultivated Oryza plants from that time has been discovered;the early stage of transition took place around 9000–7000 years ago—archaeological evidence of rice farming from that time has been found,such as villages,domesticated rice,farming tools,etc.,but subsistence then was still mainly based on hunting and gathering,whereas rice farming and pig breeding,which fall into the agricultural production category,were only auxiliary production activities;the late stage of transition took place around 7000–5000 years ago,when the proportion of subsistence attained by hunting and gathering gradually declined while the proportion of rice farming increased day by day;and the stage of completion took place about 5000 years ago,when hunting and gathering was replaced by rice agriculture in the middle and lower reaches of the Yangtze River successively. 展开更多
关键词 rice agriculture middle and lower reaches of the Yangtze River ORIGINATION flotation results
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