皖麦50分蘖成穗的综合分析

目的]为皖麦50的推广种植提供理论依据。方法]通过田间试验对不同种植密度和不同产量水平下皖麦50群体的分蘖动态进行了综合分析。结果]皖麦50冬前单株茎数与叶龄的回归方程为Y=0．1531e0.6199x；冬前出叶数与总积温的回归方程为z=1．199 10.0042∑1；冬前单株分蘖数与积温的回归方程为y=0．01531e0.01281∑τ；穗粒数和穗粒重与单株穗数的回归方程分别为y1=36．20＋1．7546x和y2=1．390＋0．0682x；株高与蘖住高度的回归方程为y=87．6054—1．9791x。当B基本苗为170万～220万／hm2，冬前单株分蘖数为5．5～6．5，群体总头数为950万-1050万／h2，单株成穗数为3．8，总穗数为632．91万／hm2时，皖麦50群体协调、高产。当有效穗数为600万一675万／hm2，穗粒数为33～35粒，千粒重为40～42g时，皖麦50的产量在7500kg／hm2以上。结论]该品种高产稳产且易干蔷培营弹．在．准北抽．区及苦淮南片砉区有宦辑的庸用莆号．

Comprehensive Analysis on the Tillering and Ear Bearing of Wanmai 50

Objective] The purpose was to supply theoretical basis for the popularization and cultivation of Wanmai 50.Method] The tillering dynamics of Wanmai 50 colonies with different planting densities and yield levels were analyzed comprehensively through field experiments.Result] The regression equation between stem number per plant before winter and leaf age of Wanmai 50 was 0.153 1e0.619 9x,its regression equation between leaf number before winter and total accumulated temperature was x=1.19910.004 2t,its regression equation between tiller number per plant before winter and accumulated temperature was y=0.015 31e0.012 81T,its regression equations between grain number per ear and grain weight per ear and ear number per plant were y1=36.20 + 1.754 6x and y2=1.390 + 0.068 2x resp.and its regression equation between plant height and tillering height was y=87.605 4-1.979 1x.When the basic seedlings were 170×104-220×104 /hm2,the tiller number per plant before winter was 5.5-6.5,the total ear number of population was 950×104-1 050×104 /hm2,the mature ear number per plant was 3.8 and the total ear number were 632.91×104 /hm2,the colony of Wanmai 50 was coordinative and high-yield.When the available ear number was 600×104-675×104 /hm2,the grain number per ear was 33-35 and the 1 000-seed weight was 40-42 g,the yield of Wanmai 50 was above 7 500 kg/hm2.Conclusion] The yield of this cultivar was high and stable and its cultivation and management were easy.It had good application prospect in Huaibei area and the south wheat area of Huanghuai.