Development of crop management techniques for higher yield by optimun control of root zone environment

通过优化控制根区环境开发作物管理技术以提高产量

基本信息

批准号：
02044107
负责人：
KUSAKA Tatsuro
金额：
$ 6.27万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

项目摘要

In order to sample the rhizosphere soil quickly and easily for biomass measurement, " rhizobox which was divided into 3 compartments by stainless mesh fabrics was applied. Utility of rhizobox was observed clearly as compared with the sampling method of rhizosphere soil by finger in the experiment of tomato cultivation.There are many kind of row covers, each differing in material and prosity. these differences in covering method or row cover type can affect the microclimate under the row cover and thermal environment of root zone. To clarify the microclimate under the row cover and the thermal conditions at the root zone, We presented the observation results and compared these results with the numerical-experiments results. Fairly reasonable agreement can be obtained between simulation experiments and observation results. ' The plant growth is not only relaed to the accumulated temperature but also to the solar radiation between row cover and soil surface.It is interested that the resul … More ts of the experiment on the color of plastic mulching materials in row mulch cultivation of egglpants at Agassiz Research Station, Canada. The yields was in the order of green brown black transparent one. The reason was thought to be the mulch. materials could effect to the upper part above the mulch surface in reflecting of light from mulch as well as soiI heating. effect, that is, green color effected to make flowering of plants promote. On the other hand, price of mulch materials is in the order of green brown black transparent one, therefore, there was no correlation between price of mulch materials and vegetable yields.Fingering behaving as the preferential-pathways is one of the most difficult problems to consider the simulating model of unsaturated water movement in the field. This year, we studied the fingering caused as the result of unstable wetting front movement in homogenious, two layered soil whose upper layer is finer and less conductive than the coarser than layer beneath. Less

为了快速而容易地品尝根际土壤的生物量测量，使用不锈钢织物织物分为3个隔室。与根茎的实验相比，与根际覆盖的覆盖物相比，在覆盖范围不同的类型和各种范围中，将根际盒的效用清楚地观察到了根际土壤的采样方法。可以在行覆盖范围内影响小气候，以阐明行覆盖物和根部的热条件，我们呈现了观察结果，并将这些结果与数值相当合理的结果进行了比较。结果……在加拿大加拿大阿加西兹研究站的覆盖物覆盖覆盖物材料的颜色的更多实验。收益率是绿色棕色黑色透明的顺序。原因被认为是覆盖物。材料可以在覆盖面上方的上部作用，以反射覆盖的光以及SOII加热。效果，即，绿色影响植物开花。另一方面，覆盖物材料的价格是绿色黑色透明的顺序，因此，覆盖物材料的价格和蔬菜产量之间没有相关性。表现为首选沿途是最困难的问题之一，考虑了该领域中不饱和水运动的模拟模型。今年，我们研究了由于均匀润湿前运动在同质的，两个分层土壤中的不稳定润湿前运动而导致的指法，其上层比下面的层更细，更低。较少的