不同配方肥对春玉米产量及农艺性状的影响

Effect of Fertilization on the Yield and Agronomic Characteristics of Spring Corn under Different Soil types Conditions

在灌淤土和淡灰钙土条件下,研究了不同施肥处理对春玉米产量和农艺性状的影响,分析了不同施肥处理的经济效益。结果表明:灌淤土和淡灰钙土田块种植玉米,施肥处理①、⑥(配方肥20%-14%-6%),处理③、⑧(配方肥21%-14%-7%)增产效果好,主要是由于4处理的果穗数、株高、穗长、穗行数、行粒数、穗粒数和百粒重等农艺性状指标优势明显,实际产量相对于理论产量依然有增产潜力。无论是灌淤土或淡灰钙土条件下,处理①、③、⑥、⑧的净产值较高,处理②、⑦(无钾施用氮、磷肥)的产投比最高,习惯施肥处理产投比最低。

Field experiments were conducted on both irrigation silting soils and light sierozems soils to study different fertil- ization patterns effected on the yield and agronomic characteristics of spring corn,and to evaluate the economic benefits by using different fertilization. The resuhs indicated that the yield increasing obviously when treated with formula fertilizer （1）,（6） （N-P2O5-K2O=20%-14%-6%） and （3）,（8）（N-P2O5-K2O=21%-14%-7%） for the spring corn in both irrigation silting soils and light siemzems soils. This was due to these agronomic characteristics such as number of ears,plant height,ear length,row number,kernel number per row,kernel number per ear and lO0-kernel weight had significant predominance,the actual yield still had potentiality for improvement in contrast to the theoretical yield. Either planting in irrigation silting soils or light sierozems soils,the net output values of spring corn treated with formula fertilizer （1）,（3）and（6）,（8）were higher than other fertil- izations,however,the ratio of output to input was highest with treatment （2）,（7）（NP）,and lowest with conventional fertilization.