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以垦鉴稻5号为材料,采用负压式土壤湿度计监测土壤水势,通过防雨棚内的盆栽控水试验,较系统地研究了水稻返青至成熟期-8～-10 kPa的间歇控水灌溉对寒地水稻物质生产、灌浆动态和产量影响。主要结果如下:控水处理使供试品种的穴穗数减少1.54%;穗粒数增加了3.93%;优、中、劣势粒的结实率分别增加了3.53%、12.77%和28.97%;优、中、劣势粒的千粒重分别增加了0.96%、0.48%和0.60%;生物产量增加8.27%;经济系数提高5.73%;经济产量增加14.47%。控水处理使供试品种开花后的干物质积累量增加,鞘输出率和转换率分别提高6.21%和4.01%。控水处理加速了供试品种的灌浆进程,延迟了劣势粒峰值出现的时间,提高了优、中、劣势粒的-G、Gmax、I和Wmax.G值,缩短优、中、劣势粒的活跃生长期。
Taking Jianjian 5 as the material, the soil water potential was monitored by a negative pressure soil hygrometer. Through the potted water control experiment in rain shelter, the intermittent control of -8 ~ -10 kPa Effect of Water Irrigation on Substance Production, Grouting Dynamics and Yield of Rice in Cold Region. The main results are as follows: Water treatment decreased the number of ear spikes of tested cultivars by 1.54%, the number of spikelets increased by 3.93%, the seed setting rates of superior, middle and inferior grains increased by 3.53%, 12.77% and 28.97%, respectively. The grain weight of inferior grains increased by 0.96%, 0.48% and 0.60% respectively, the biological yield increased by 8.27%, the economic coefficient increased by 5.73% and the economic yield increased by 14.47%. Controlled-water treatment increased the dry matter accumulation of the tested varieties after flowering, and the sheath output rate and conversion rate increased by 6.21% and 4.01% respectively. Controlled-water treatment accelerated the filling process of the tested varieties, delayed the appearance time of inferior grains and increased the values of -G, Gmax, I and Wmax.G, and shortened the superior, middle and inferior grains of superior, middle and inferior grains Active growth period.