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Developmental studies on weed control method by mulching recycled paper.

覆盖再生纸除草方法的进展研究

基本信息

批准号：
05556004
负责人：
TSUNO Yukindo
金额：
$ 8.26万
依托单位：
Tottori University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05556004/
关键词：
Recycle paper Mulching Rice Germination Seedling emergence Calcium peroxide Boric acid Direct sowing 湛水直播雑草の光合成硝酸マグネシュウム

项目摘要

The objectives of this study were (1) to promote seedling emergence and establishment on the direct sowing in flooded paddy field, (2) to make clear the characteristics of photosynthesis on main weeds and (3) to pursue the possibility of realization on the direct sowing with mulching recycled paper.(1) We investigated germination and seedling emergence on seeds coated with calcium peroxide (CaO2) adding several chemicals under the conditions of 2 cm sowing depth and 3 cm flooding.When boric acid (H3BO3) and/or magnesium nitrate hexahydrate (Mg (NO3 ) 2) were added 1% to CaO2, percentage of seedling emergence was higher than only CaO2. This efficacy of both chemicals was seemed that H3BO3 sterilized soil around a seeds and Mg (NO3) 2 supplied oxygen and nutriment for seeds.(2) We prepared the light and photosynthesis curves in water of main weeds and examined the illuminance at the respiration rate and amount of photosynthesis became the same (illuminance at the compensation point) . The results was considered that no weed would be able to grow if about 90% of the light was shaded.(3) The most important point in using the paper mulch direct sowing was make sure that the paper and soil stick firmly to each other.For this purpose, it should do soil puddling and leveling work carefully to make soil surface as flat as possible. And the irrigation water should be 1 cm deep or less. This is because pieces of paper will rise to the surface after sowing and shade seedling if the water is too deep. Thus, this will affect their growth adversely.

本研究的目的是：（1）促进稻田直播的出苗和成苗;（2）明确主要杂草的光合特性;（3）探讨再生纸覆盖直播实现的可能性。(1)在播种深度为2cm、淹水深度为3cm的条件下，研究了过氧化钙（CaO 2）与几种化学药剂的包衣处理对水稻种子萌发和出苗的影响，结果表明，在CaO 2中添加1%的硼酸（H3 BO 3）和/或六水硝酸镁（Mg（NO3）2），其出苗率高于单独使用CaO 2。H_3BO_3消毒种子周围土壤，Mg（NO_3）_2为种子提供氧气和养分，这两种化学物质的作用是相同的。(2)我们制作了主要杂草在水中的光和光合作用曲线，并检查了呼吸速率和光合作用量变得相同时的照度（补偿点处的照度）。结果认为，如果约90%的光被遮蔽，则没有杂草能够生长。(3)采用纸膜直播时，最重要的一点是要保证纸与土的粘结牢固，为此，应认真做好土壤的搅平工作，使土壤表面尽可能平整。灌水深度应在1厘米以下，因为播种后纸片会浮到水面，如果水太深，会遮蔽幼苗。这将对他们的成长产生不利影响。