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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研究了结实前水分供应对寒地水稻灌浆动态和产量影响。研究结果表明,结实前进行-8～-10kPa的间歇控水处理,垦鉴稻5号的经济产量增加;垦鉴稻5号优、劣势粒的平均生长速率(■)和最大生长速率(Gmax)值升高,中势粒表现则相反;垦鉴稻5号优、中势粒相当于生长终值百分数的I值升高,劣势粒表现则相反;垦鉴稻5号优势粒的活跃生长期D缩短,中、劣势粒的相反;垦鉴稻5号各粒位生长速率最大时的生长量(WmaxG)值增大。结实前进行-18～-20kPa和-28～-30kPa的持续控水处理,垦鉴稻5号的经济产量均极显著降低;垦鉴稻5号优势粒的■和Gmax值降低,中势粒、劣的相反;垦鉴稻5号各粒位的I值升高、活跃生长期D缩短、Wmax.G值增大。
Taking Jianjian 5 as the material, the soil water potential was monitored by negative pressure soil hygrometer. The effect of moisture supply before grain compaction on the dynamic and yield of paddy rice in cold region was studied through the potted water control experiment in rain shelter. The results showed that the economic yield of Kenjian 5 was increased before intermittent water control of -8 ~ -10kPa before the seed setting. The average growth rate (■) and maximum growth rate (Gmax) of Kenjian 5, ) Value increased, while that of medium potential grain was the opposite. The value of I in Kenjiangyou No.5 and medium potential grain equivalent to the percentage of final value increased, while the inferior grain showed the opposite trend. Period D shortened, the opposite of inferior and inferior grains. The value of WmaxG increased with the grain growth rate of Kenjiadao 5 at the maximum. Before watering-18 ~ -20kPa and -28 ~ -30kPa continuous water control treatment, the economic yield of Kenjian 5 was significantly reduced; the value of Gmax and Km of Kenwei 5 decreased, , But the opposite was inferior. The I value of each grain of Kenjiadao 5 increased, the active growth period D shortened and Wmax.G increased.