Legume cover crop reseeding for strategic field management

豆类覆盖作物重新播种以进行战略性田间管理

基本信息

批准号：
18580253
负责人：
KOMATSUZAKI Masakazu
金额：
$ 2.41万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18580253/
关键词：
Cover crop Tillage Reseeding Nitrogen Tomato Farming system Nematode Life cycle model カバークロップ耕うん土壌線虫

项目摘要

Subterranean clover (Trifolium subterraneum) appears to be a suitable winter legume cover crop for Japan because the subterranean clover stands maintain themselves by reseeding in autumn and the large seeds facilitate establishment and enable early fall production. However, there is little information on the relationship between reseeding and tillage system for subterranean clover under Japanese climatic conditions. A simple equation model was developed to determine the effects of tillage method and timing on reseeding from year to year in subterranean clover-silage corn rotation based on data from field and pot experiments. The developed model was inserted into life-cycle models for subterranean clover growth and seed production competing with weed growth, seasonal changes of seed bank dynamics in the soil and subterranean clover seed movement within the soil by tillage treatment after seed maturation. In the simulation results, the population of reseeded subterranean clover seedlings varied according to tillage method and timing and the results agreed with the results of the experiments. Rotary tilling immediately after subterranean clover seed maturation successfully produced a good subterranean clover stand the following spring. However, rotary tillage 2 months after seed maturation withered emerging subterranean clover seedlings and the field was dominated by winter weeds. These simulation results suggest that a suitable tillage system would be able to maintain successful subterranean clover reestablishment from year to year.

地下三叶草（地下三叶叶）似乎是日本的合适冬季豆科植物覆盖作物，因为地下三叶草的立场是通过在秋天播种来维持的，而大种子可以促进建立并促进早秋天的产量。但是，在日本气候条件下，在地下三叶草的恢复和耕作系统之间的关系几乎没有信息。开发了一个简单的方程模型，以根据田间和锅实验的数据来确定耕作方法和时间对在地下三叶草 - 盐玉米旋转中的效果。将开发的模型插入了生命周期模型中，用于地下三叶草生长和种子生产，与杂草生长竞争，土壤中种子库动力学的季节性变化以及在土壤中通过种子成熟后的耕作治疗中的土壤中的下三叶草种子运动。在仿真结果中，已恢复的地下三叶草幼苗的种群根据耕作方法和计时而变化，结果与实验结果一致。地下三叶草种子成熟后立即耕作成功产生了良好的地下三叶草。然而，种子成熟后2个月，旋转耕作枯萎了新兴的地下三叶草幼苗和田野由冬季杂草主导。这些模拟结果表明，合适的耕作系统将能够每年保持成功的地下三叶草重建。