Cycling and balance of copper in farmland ecosystem of Jianghan plain in Hubei Province

Abstract

Abstract: The cycling and balance of copper in8 cropping systems,i.e,wheat-rice,rice-rice,rape-soybean,rape-peanut,wheat-sesame,wheat-cotton,pepper-cabbage and radish-eggplant in Jianghan plain of Hubei Province were studied. The results showed that the main output of copper was crop harvesting,up to 85.9%～95.1% of total output,and the output of copper by field runoff and soil leaching was low. The main inputs of copper were organic fertilizer,rainfall,falldrop,and natural return.The inputs of copper from inorganic fertilizer and seeds (seedlings) were low. The balance analysis pointed out that copper had an accumulative trend in two patterns of rice and commercial vagetable ecosystem,and was in balance in upland field ecosystem.

Key words: Jianghan plain, Farmland ecosystem, Copper cycling and balance, solar radiation, land use type, optical fisheye lens, leaf area index

CLC Number:

S181

LIN Kuangfei, XU Xiaoqing, XIANG Yaling, JIN Xia, SHAO Zhihui. Cycling and balance of copper in farmland ecosystem of Jianghan plain in Hubei Province[J]. Chinese Journal of Applied Ecology, 2003, (1): 71-74.

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