受渍条件下稻田玉米产量与渍害指标的关系

Study on the relationship between water-logging stress index and yield of spring corn under water-logging condition in paddy field

初步研究了稻田玉米营养生长期间受渍条件下的水分生产函数 ,并结合实验资料建立了受渍条件下稻田玉米营养生长期干物重的水分生产函数与最终产量的水分生产函数 .结果表明玉米相对产量、相对干物质重与受渍天数因子及受渍抑制天数指数呈显著线性负相关 .玉米 4叶期是受渍影响的敏感时期 ,时间越长 ,产量与干物质降幅越大 .借助于建立的稻田玉米相对干物质重生产函数 ,结合相对产量指标 ,可以受渍天数因子或受渍抑制天数指数作为稻田玉米渍害大小的指标 。

WT5”BZ]This paper analyzes the corn production function under water logging condition of paddy field Based on the experiment of different corn development stage (4, 6, 8 leaf stage) with different waterlogging days (5, 10, 15 days of ground water 10 cm below soil surface) treatments, a corn production function under waterlogging condition of paddy was established The results showed the relative yield, relative dry matter weight of corn had a significant negative liner relationship with SEW and SDI to the soil watrlogging among the 3 leaf stages of corn Combined with the relative yield indicators of corn, the SEW and SDI can be used as the index to assess the water logging effect on the corn yield Furthermore, it could also be used to give the critical value of water logging days in the paddy field according to the relative yield requirement [WT5”HZ]