论文部分内容阅读
以山西引进的绿米软谷为试验材料,研究了谷子高产优化农艺措施与产量的关系。结果表明:随着密度增大,绿米软谷的株高呈增高趋势,茎粗、穗长和每穗小穗数则表现为减小趋势,经济产量表现为中密>低密>高密;在一定施氮量范围内,随着施氮量增加,绿米软谷表现为植株高度增加、茎秆变细,穗子增长、每穗小穗数减少的趋势,过量施用会抑制其生殖发育,减少每穗小穗数和穗长;施磷量对绿米软谷株高和茎粗无显著影响,适量增施磷肥可促进谷穗长度和每穗小穗数增加,经济产量随施磷量增加呈直线增加趋势。通过多元回归分析,建立了施氮量、施磷量、密度与产量关系的数学模型。采用产量决策频数分析方法,得出呼和浩特地区绿米软谷实现产量350 kg/667m2以上农艺措施优化组合方案为:密度2.5~3.0万株/667m2,施磷量(P2O5)9.6~12.5 kg/667m2,施氮量(N)15.4~21.4 kg/667m2。此农艺措施优化组合方案可作为呼和浩特地区谷子高产栽培的参考依据。
Taking the soft green rice introduced from Shanxi as the experimental material, the relationship between high yield agronomic measures and yield of millet was studied. The results showed that the plant height of soft rice increased with the increase of density, and the stem diameter, panicle length and spikelet per panicle showed a decreasing trend. The economic yield showed medium density> low density> high density. Within a certain nitrogen application rate, with the increase of nitrogen application rate, the soft rice showed the plant height increased, the stems thinner, the ear growth, the number of spikelets per panicle reduced. Excessive application inhibited the reproductive development, The number of spikelets per panicle and spike length were reduced. The amount of phosphorus application had no significant effect on plant height and stem diameter of green rice soft-shelled-grain. Appropriate amount of application of phosphate fertilizer could increase the length of spikelets and increase the number of spikelets per spike. Increase in a straight line to increase the trend. Through multiple regression analysis, a mathematical model of the relationship between nitrogen application, phosphorus application, density and yield was established. Based on the method of yield decision frequency analysis, the optimal combination plan of agroecological measures above 350 kg / 667m2 for the green rice soft valley in Hohhot is obtained: the density is 2.5-30,000 / 667m2, the P2O5 is 9.6-12.5 kg / 667m2 , N application rate (N) 15.4 ~ 21.4 kg / 667m2. This agronomic optimization program can be used as a reference for high-yielding millet in Hohhot.