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根据旱地裸燕麦生长发育的特性,找出合理群体结构的生理指标是:旱地裸燕麦每亩播种49—54万粒,旱滩地每亩构成亩穗数在50万穗以上;旱坡地每亩构成亩穗数在35万穗以上,通过正交试验的分析;旱坡地最优配合组合为A_3B_3,(即用高8—21品种,采用每亩播种49万粒的密度);旱滩地最优配合组合为A_3B_1和A_3B_2(即用高8—21品种,采用每亩播种49—54万粒的密度;旱坡地获得每亩218.3斤,旱滩地每亩332.5斤的产量表现最高。从个体生育强弱的表现来看,旱滩地上穗粒重在1.25—1.54克,千粒重23.8—24.6克,合理的叶面积系数在2.5—8之间,平均值2.7—2.8,超过4的产量开始下降。在旱坡地上穗粒重0.51—0.74克,千粒重在25.2—25.4克,合理叶面积系数1.5—2之间,平均值1.6—1.7,超过2的产量开始下降。根/冠比值耒看,生育前期根冠比值大的,生育中期到后期根冠比值下降较平缓的产量表现高。从营养生长转向生殖生长的物质分配转移动态,在旱滩地上莜麦植株在拔节期的叶增长量若占全株干物质增长量的55％左右,茎的增长量占全株干物质的增长量的45％左右,是为丰产奠定物质基础的协调比例。在成熟前,穗的增长量占全株干物质增长量的50％以上者,均表现产量较高。由上述每项指标有特殊意义,而相互之间又是联系的不可分割的。
According to the characteristics of dryland oat growth and development, to find a reasonable population structure of the physiological indicators are: dry oat acres planted per acre 49-54000 acres, dry land acres per acre constitutes more than 500000 spike; The number of spikes per mu was above 350,000 spikes, which was analyzed by orthogonal test. The best combination of dry-slope land was A_3B_3 (that is, with the highest 8-21 varieties and the density of 490,000 seeds per acre) Combination of A_3B_1 and A_3B_2 (that is, with high 8-21 varieties, the use of per acre planting 49-54 million density; 218.3 kg acre per acre on the dry land to 332.5 kg per acre yield highest performance from the individual fertility , The dry weight of spikelet in the dry land is 1.25-1.54g, the grain weight is 23.8-24.6g, the reasonable leaf area coefficient is between 2.5-8 and the average is 2.7-2.8, and the output of more than 4 begins to decline. The grain weight of 0.51-0.74 g on the hillside, the grain weight of 25.2-25.4 g, the reasonable leaf area coefficient of 1.5-2, the average value of 1.6-1.7, the yield of more than 2 began to decline. The ratio of root to shoot decreased from the middle of the growth to the later, Growing to reproductive growth of the physical distribution of the transfer of the transfer dynamics, in the dry land on the oat barley plant growth at the jointing stage if the whole plant dry matter growth of about 55%, stem growth accounted for whole plant dry matter growth Of the total, about 45% of the total, is the coordination of the material basis for the high yield of the ratio before maturity, the spike growth accounted for more than 50% of total plant dry matter growth, both showed higher yield by the above indicators have special significance , And they are inextricably linked with each other.