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

High Density-Low Truss NFT Tomato Production System with Quantitative Nutrient Management

具有定量养分管理的高密度低桁架 NFT 番茄生产系统

基本信息

批准号：
16380021
负责人：
MARUO Toru
金额：
$ 10.05万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

We developed the quantitative nutrient management (QNM) at low nutrient concentration technique using light dependent control and modified NFT system for high-density low-truss year-round tomato production system. In high-density tomato production system, the growth control to get compact and thick leaf system is very important technique for high productivity. The beneficial effects of our developed system were easy to control the growth of tomato plants (resulted in more stable and high yield), to support easy crop management (from short plant height), to uniform load of working (from multi-crop culture) and to reduce the emission of nutrients through the solution renewing process (resulted in environmentally friendly cultivation).Tomato seedlings with limited volume of growing media (RW granule) were planted in a closed NFT system in which channels were modified through the addition of a steep sloped section along the short axis of channel besides conventional slope along long axis. This modification accommodated low nutrient concentrations to uniform cultivation by reducing upstream-downstream gradients of nutrient concentrations.With QNM technique using light dependent control, the preset amount of nutrient (0.2 to 0.4me・plant^<-1>・MJ^<-1>・m^2) was supplied when the cumulative solar radiation (CSR) reached to given MJ・m^<-2> value. The preset amount was increased gradually (for instance 0.2-0.4me・plant^<-1>・MJ^<-1>-m^2) with the process of growth stage.Tomato was topped two leaves above the third truss. After the harvest of third truss, next crop started immediately and 3 to 3.5crops per year were realized. The estimated yield was near to 300t・-ha^<-1> with QNM using light dependent control.

在高密度低桁架全年番茄生产体系中，采用光依赖控制和改良NFT系统，开发了低养分浓度定量管理技术。在高密度番茄生产体系中，生长控制是获得致密厚叶体系的重要技术手段。我们开发的系统的有益效果是易于控制番茄植株的生长（导致更稳定和高产），支持作物管理（从株高矮），工作负荷均匀（从多作物栽培），并通过溶液更新过程减少营养物质的排放（导致环保栽培）。用有限体积的生长介质（RW颗粒）种植番茄幼苗，在封闭的NFT系统中，除了沿长轴的常规坡度外，还通过沿通道短轴增加陡坡段来修改通道。这种改良通过减少养分浓度的上下游梯度来适应低养分浓度的均匀栽培。QNM技术采用光依赖控制，当累积太阳辐射（CSR）达到给定的MJ·m^<-2>值时，提供预设的营养量（0.2 ~ 0.4me·植株^<-1>·MJ^<-1>·m^2）。随着生长阶段的推进，预设量逐渐增加（如0.2 ~ 0.4me·plant^<-1>·MJ^<-1>-m^2）。西红柿在第三个桁架上方有两片叶子。第三个桁架收获后，立即开始下一季，实现了每年3 ~ 3.5季。QNM采用光相关控制，估计产量接近300t·-ha^<-1>。