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对不同源库类型水稻品种的LAI动态和干物质生产研究结果表明:增源增产型品种(如辽粳5号)的LAI动态属快起快落型,干物质生产中期具有明显优势,占总干重的50%以上,而且总干物质产量也高,但经济系数低。增库增产型品种(秀杂)的LAI动态呈中起中落型,在干物质生产上,该类型品种中期和后期差异不大,干物质增长比较平稳。源库饱和型品种(青系96)的LAI动态则呈中起慢落型。其干物质积累近于前者。结合产量分析,在中肥条件下,LAI动态呈中起中落的品种产量高,但LAI动态呈快起快落的品种则在低肥下栽培产量高。
The results of LAI dynamic and dry matter production of rice cultivars with different source and sink types showed that LAI dynamic of increasing yield and yielding varieties (such as Liaojing 5) were fast-acting and fast-dropping, and the middle period of dry matter production had obvious advantages, More than 50% of dry weight, but also the total dry matter production is high, but the economic coefficient is low. The LAI dynamic of the increased yielding varieties (Xiuzao) increased from mid-fall to mid-fall and the dry matter growth was relatively stable in dry matter production. The LAI dynamics of the source-sink type (Qing 96) showed a slow falling pattern. Its dry matter accumulation is close to the former. According to the yield analysis, under the condition of medium fertilizer, the yield of LAI fluctuated from high to low, while the yield of fast LAI from LAI was high under low fertilizer.