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Position: Home > Articles > Temporal Variation of Plant Height,Plant Cover and Leaf Area Index in Inter-cropped Area of Sichuan,China Research of Soil and Water Conservation 2007,14 (2) 72-75

中国四川间作地区作物高度、覆盖度和叶面积指数的时间变化

作  者:
林超文;陈一兵;黄晶晶
单  位:
四川省农业科学院土壤肥料研究所
关键词:
空间变化;作物高度;作物覆盖度;叶面积指数;间作
摘  要:
作物参数在模型模拟中具有非常重要的作用。但很多关于作物参数的研究是很久以前的,一般发表于20世纪中期或更早,并且这些结果都来自于净作作物。为了填补这个空缺,进行了该项研究。结果显示:作物的高度、覆盖度和叶面积指数随时间变化很大。玉米的最大高度是177 cm,间于已有的文献值范围内。玉米的最大覆盖度是花期的86%。玉米的最大叶面积指数是1.96,低于参考文献的2.1~10的范围,这是因为参考文献的研究集中于北美和欧洲,由于品种和耕作制度的不同而造成的。甘薯的最大和最小株高分别为22 cm和12 cm。甘薯的最大覆盖度为薯块膨大期的73%。甘薯的最大叶面积指数是1.79。当甘薯和玉米间作时,其所有的作物参数受玉米影响很大。在玉米-甘薯这个间作系统中,最危险的侵蚀期是玉米收获后至甘薯覆盖度最大期。
译  名:
Temporal Variation of Plant Height,Plant Cover and Leaf Area Index in Inter-cropped Area of Sichuan,China
作  者:
LIN Chao-wen,CHEN Yi-bing,HUANG Jing-jing (Soil and Fertilizer Inst.,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China)
关键词:
temporal variation;plant height;plant cover;leaf area index;inter-cropping
摘  要:
Plant parameters play a very important roll in modeling.But a lot of investigations about plant parameters are relatively old and were published in the mid 20th century or earlier and most of the information is gathered on non-inter-cropping crops.To fill up this gap,this study was implemented.The result shows that plant height,plant cover and leaf area index vary greatly temporally.The max-plant height of corn is 177 cm which within the range of other publications.The max-plant cover of corn is 86%,which it occurs at the flowering stage of corn.The max-leaf area index of corn is 1.96 which is out of the reference range of 2.1~10,it is because the references are focused on North America and Europe with different land cover species and the farming systems.The max-and min-plant height of sweet potato is 22 cm and 12 cm,respectively.The max-plant cover of sweet potato is 73% which occurs at the earthnut expanding stage.The max-leaf area index of sweet potato is 1.79.When the sweet potato is inter-cropped with corn,all the plant parameters of sweet potato were influenced by corn strongly.Within this inter-cropping system,the most erosion dangerous period is from the corn being harvested to the sweet potato covering soil surface exposed by harvesting corn.

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