The results showed the narrow row spacing can remarkable raise wheat ear numbers and yield 结果表明，相同基本苗情况下，缩小行距放稀株距均能显著提高2个小麦品种的成穗数，增产显著。
2.
For it is not solved about the synchronization of the amount of seeding transplant and velocity in application , when the velocity is changed , the amount of seeding transplant is not adjusted timely 当行走速度改变时，由于摆秧量没有得到同步调整，故秧苗株距不能得到适时有效控制。
3.
Because of the complekity of the sallce of theng field , at present the quality of seedng on the conservation tillape land is lower than tradihonal hllage land , distanee between seedlings being not whfonnly , occurring absent seeding and even whole absent rows of seedings 由于保护性耕作地面的复杂性，目前玉米免耕精播机播种质量仍逊于常规播种，株距不匀、漏播、甚至因堵塞整行漏播的情况时有发生。
4.
The results show , that the yield of no . 2 is 26 % higher than no . 1 . the appropriate density and stage of transplanting were determined . the highest total yield was obtained at the spacing of 45cm x 30cm , and the highest yield of first harvest at 45cm x 10cm 结果表明，日本夏菊2号的鲜花总产量比日本夏菊l号高26 % ;确定了适宜的定植密度和定植期:定植行距45cm ，株距30cm时，鲜花总产量最高;定植行距45 。
5.
Based on the analysis of the kinetic track of the scallion during planting , basic relationships ' among the characteristic parameters of the transplanter with two flexible metal disks , including the velocity of the transplanter , the rate of transplanting , the spacing between seedlings , the angle of releasing seedlings , the diameter and length of seedlings , have been set up in this paper , and then a mathematic model of optimum design for the transplanter with the final planting angle of seedlings ( y = 90 ) has been formulated and solved with good results . according to the optimum solutions , a new type of transplanter with two flexible metal disks has been developed and the field tests of the transplanter have been conducted 为了实现大葱机械化移栽，作者分析了国内各种移栽机的结构特点，确定了以挠性圆盘式栽植器为研究对象，在分析挠性圆盘式栽植器的运动轨迹和特征参数的基础上，完整地确立了挠性圆盘式移栽机的基本参数：栽植频率、栽植株距、机组前进速度、输送带上秧槽的间距、挠性圆盘半径、挠性圆盘的转速、夹苗株数以及传动比之间的相互关系，并建立了以葱苗栽植倾角= 90为目标的优化设计数学模型，提出了挠性圆盘式大葱移栽机的优化设计方法。
6.
Has become one of cash crops of regional scale planting for many years in china . unfortunately , because scallion is planted with a small spacing between seedlings , all kinds of available transplanters made in domestic can not be used for transplanting scallion , so up to now scallion planting has to be planted by manual tools 大葱在我国已成为区域规模种植的经济作物之一，由于大葱移栽的农艺要求特殊性，国产的各种移栽机都不适合大葱这类小株距作物的移栽，大葱移栽机在国内的研究与应用方面还是空白。
