Study On The High Oil Corn Physiology Characteristics And Yield Traits In Different Densities

Developping the high-quality corn is the inevitable trend that corn production. We sdudy the effects of the different densities to the high oil corn physiology characteristics, the relation about the yield and its factors , and economic performance in 2002-2004 at Shihezi city. The main experiment result as follows:1. By the analysis to the weather adaptability of high oil corn in Xinjiang, the weather condition of Xinjiang can satisfy the maturity of the high oil corn; by comparing about the agriculture and economic traits on the corn variety Sc704 and the high oil corn varieties ( Gaoyou 115 and Gaoyou 298), the whole level of high oil corn is better, and exceeded the variety Sc704 in some aspects.2. In the whole growing period ,the LAI of the three varieties get bigger as the change of the density, increasing most quick from silk to big trumpet period and getting deceleration at the later period of wax mature. The dry material accumulation of gaoyou115 is similar as Sc704, it is a curve of S, the population dry material accumulation increases with the density increase. the material production rate of gaoyou 115 gets average 322.79 kg/hm~2·D from jointing to mature for density of 82500 ,gaoyou 298 get 308.52 kg/hm~2·D, Sc704 is 267.92 kg/hm~2·D ,it is high than the population of other densities. the LAD of the gaoyou 115 is average 140.69×10~4m~2·d/hm~2 from silking to milk mature, the gaoyou 298 is 130.87×10~4m~2·d/hm~2,and the SC704 is 99.54×104m~2·d/hm~2, generally net photosynthetic rate of high oil corn is higher from jointing to milk mature ,and net photosynthetic rate of high oil corn is lower than the Sc704 obviously.3. The relation between the high oil corn yield and density is two times curve equation. Gaoyou 115: Y=6818.4+4980x-1002.12x~2, Gaoyou 298: Y=3429.45+8308.2 x-1592.7x~2, Sc704: Y=5425.8+9066.6x-1797.75x~2. the relation between the high oil corn fresh yield and densities is:Gaoyou 115:Y=354.06-114.97x+16.67 x~2 -0.78x~3, Gaoyou298:Y=327.04-106.33x+15.99x~2-0.76x~3, Sc704:Y=-494.62+230.01 x-30.12x~2+1.27x~3.Related analysis prove;the kernel number per row and weight per thousand kernel influence greatly to the yield of the sc704, the ear wide ,the kernel number per row and weight per thousand kernel influenceses bigger to the yield of Gaoyou 115, the ear wide and the kernel number per row influences bigger.to the yield of Gaoyou 298.4. The fresh yield of the Gaoyou 115 is 29.74% high than sc704, the per hectare adds profits 4312.5 yuan; the fresh yield of the Gaoyou 298 is 31.5% high than sc704, the per hectare adds profits 4684.5 yuan. The comprehensive performance of the Gaoyou 115 increase 4083.53 yuan than sc704, Gaoyou 298 increase 4005.87 yuan than sc704.The result shows:we should plant high oil corn as silage corn. i n Xinj iang...