论文部分内容阅读
本研究在高产田条件下，选用了大穗型核生2号、多穗型烟在15和中穗型泰876161三个冬小麦品种，研究了播种期对小麦边际的影响。主要结果是：（1）适期播种较晚播有利于发挥小麦边行优势。边行较内行的增产幅度，适期播种下以多穗型烟在15最大，大穗型核生2号最低；晚播下，则以大穗型核生2号最大，多穗及中穗型较低。（2）边行较内行增穗、增粒、增粒重，以适期播种增加幅度大于晚播。边行较内行增产，以增穗为主，其次是增粒，再次是增粒重。播期变晚，增穗增产的贡献进一步提高，而增粒和增粒重增产的贡献比重相对下降。（3）播期变晚，边行小麦的减产幅度大于内行。品种类型不同，边、内行耐晚播的程度不同。边行小麦以大穗型核生2号耐晚播稍强，而内行则以多穗型烟农15耐晚播较强。从边、内行平均产量看，晚播比适播的减产幅度以大穗型品种较大，而多穗型品种较低，中穗型品种居中。
In this study, we selected three winter wheat cultivars with large panicle type, Kansheng No.2, multi-panicle type smoke at 15 and middle panicle type 876161 in high-yielding fields. The effects of sowing date on wheat marginalis were studied. The main results are: (1) The sowing of late sowing is conducive to the development of wheat sideline advantage. Compared with the average rate of yield increase, the maximum number of multi-spike type tobacco at sowing date was the highest at 15, while that of the largest panicle type was the lowest. On the next sowing date, Lower type. (2) Compared with those in line, the border lines increased earning, grain increment and grain weight increase, and the increase of sowing date was more than that of late sowing. Line more than the line to increase production to increase ear-based, followed by grain, and then increase grain weight. The sowing date was late, the contribution of earning and yield increasing further increased, while the contribution of grain increment and grain yield increment decreased relatively. (3) The sowing date is late, and the yield reduction of border wheat is larger than that of the experts. Different types of different types of edge, the line of delay of late broadcast of different levels. On the other hand, the large-spike kernel type 2 was tolerant to late sowing, whereas that of layworm was more resistant to late sowing. From the side, the average production line, late-sowing sowing than the sowing rate of large-panicle varieties larger, while the more spike-type varieties lower, middle-spike varieties in the middle.