不同施氮水平对芸豆产量的影响

Effects of Nitrogen Fertilizer Application Rates on Yield of Kidney Bean

以英国红芸豆为试材,研究了不同施氮水平对芸豆产量、产量构成因素、叶面积指数、光合势、生物量和干物质积累等的影响。结果表明,随着氮肥施用量的增加,芸豆产量呈上升趋势,当尿素用量达到740 kg/hm2时,芸豆产量可达到最高(2152 kg/hm2);随着氮肥施用量的增加,单位面积荚数、每荚粒数和百粒质量都呈上升趋势;在整个生育期内,叶面积、各阶段光合势和总光合势均随氮肥施用量的增加而升高;不同氮肥施用水平下单株的生长曲线符合S型曲线变化;植株各部位在出苗后不同时期干物质积累所占的比例和面积有所差异。

This paper reported the results from the experiment in which English Red Kidney Bean as material in the field on Loess Plateau under different nitrogen fertilizer application seed yield, yield constitute factors, LAI and LAD were studied. Major results were as follows： Yield of kidney bean increased with the nitrogen fertilizer application. The function of pods number, seed number and 100-seed weight on yield increased with the nitrogen fertilizer application. Phases and total LAD of red kidney bean increased with nitrogen fertiliz- er application in whole growing period. The plant growing curve of red kidney bean under different nitrogen fertilizer application appeared ＂S＂ curve. There were difference in proportion and area of dry matter accumulated of all plant parts between different seedling emergence dates.