权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Carbon dioxide circulation to harmonize global environmental aspect with crop production

二氧化碳循环使全球环境与作物生产相协调

基本信息

批准号：
07458118
负责人：
SAKAI Naoki
金额：
$ 4.99万
依托单位：
University of Tsukuba (1996)The University of Tokyo (1995)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

With an aim of contributing from agricultural side to prevent the progress of global warming, we carried out the factorial experiment on a field composed of tillage method (two levels ; conventional tillage (CT) / no-tillage (NT)) x cropping style (three levels ; single cropping/ single cropping/ mixed cropping) x treatment of weeding (weeding/ no-weeding) x repetition (three plots), and measurement of soil respiration rate on a field from December in 1995 to August in 1996.From the experimental result, (1) The dry matter yield of weed in single cropping was more than that in mixed cropping, and the yield in NT plot was more than that in CT plot. (2) The dry matter yield of leaf and stem of crops in CT plot was more than that in NT plot at the first and the third croppings in case of barley and wheat, but the yield in NT was more than that in CT plot at the second cropping in case of sorgo and corn. (3) In dry matter yield of grain, the first, the second and the third in order were "weeding", "weeding" and "no weeding", respectively, at the first and the third croppings. (4) In fixed carbon dioxide by plants calculated from the total dry matter yield and its conversion value, there was no notable difference between in NT plot and in CT plot. We compared the values of fixed carbon dioxide by all plants and the value of fixed by a deciduous trees in forest. From the calculated results, the notable effect of fixation by plants produced in no-tillage and mixed cropping on a field was shown. (5) In the measurement of soil respiration rate, there was no difference between in NT plot and in CT plot during crop growing period, but the value in NT plot was larger than that in CT plot during season without crop on a field.

为了从农业方面为阻止全球变暖的进程做出贡献，我们在一块由耕作方式(两个水平：常规耕作(CT)/免耕(NT))×耕作方式(三个水平；单季/单季/混作)×除草(除草/不除草)×重复(三个小区)的处理，并于1995年12月至1996年8月进行了田间土壤呼吸速率的测定。结果表明：(1)单季杂草产量高于混作，且NT小区产量高于CT小区。(2)大麦、小麦第一季和第三季叶、茎干物质产量，大麦、小麦均高于免耕，而山梨、玉米复种时，免耕高于免耕。(3)在籽粒干物质产量上，第1、2、3茬依次为“除草”、“除草”、“不除草”。(4)按总干物质产量及其转换值计算的植株固定二氧化碳，NT区与CT区差异不显著。我们比较了森林中所有植物固定二氧化碳的值和落叶树固定二氧化碳的值。从计算结果可以看出，免耕和混作对田间植株的固定效果显著。(5)在土壤呼吸速率的测定中，在作物生长期内，NT样地和CT样地之间没有差异，但在休耕季节，NT样地的土壤呼吸速率值大于CT样地。