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.

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从1995年12月到1996年8月。从实验结果，（1）单个农作物中杂草的干物质产量比混合种植中的杂草高得多，而NT图中的产量大于CT图中的产量。（2）CT图中农作物的叶子和茎的干物质产量比在大麦和小麦的第一个和第三个裁切片中的叶子和植物的叶子的收益率要大，但是在sorgo和玉米的情况下，NT的产量远远超过第二次裁剪的CT图中的收率。（3）在谷物的干物质产量中，第一个，第二和第三个是“除草”，“除草”和“无除草”，在第一个和第三个裁剪中分别是“除草”。（4）在固定二氧化碳中，根据总干物质产量及其转化值计算得出的植物，在NT图和CT图中没有显着差异。我们比较了所有植物的固定二氧化碳的值以及森林中落叶树的固定值。从计算出的结果中，显示了在无耕地中产生的植物固定的显着影响，并显示了在田间上的混合作物。（5）在测量土壤呼吸速率时，在农作物生长期间，NT图和CT图中没有差异，但是NT图的值大于季节中CT图中没有农作物在田间上的CT图。