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以两优287为材料,研究了水分管理与氮肥运筹对鄱阳湖流域水稻磷素吸收利用的影响。结果表明,在等量磷投入的条件下,磷素积累总量随施氮量的增加而增加;间歇式灌溉抑制了水稻生育前中期的磷素积累量,促进了生育后期的磷素积累量,提高了茎鞘的磷素转运量和比例以及穗部磷素的增加量。在间歇式灌溉和常规淹灌方式下,氮肥施用量180 kg/hm2时,氮肥后移(基肥∶分蘖肥∶穗肥=5∶3∶2)均能提高水稻磷素积累总量和穗部磷的增加量。在本试验条件下,不同水分管理和氮肥运筹组合的磷素积累总量和产量以W1N2F(2水分间歇式灌溉,氮肥用量180 kg/hm2,其基肥∶分蘖肥∶穗肥=5∶3∶2)组合的最高。可见氮肥后移有利于促进水稻对磷素的吸收利用。
Using Liangyou 287 as material, the effects of water management and nitrogen fertilizer application on phosphorus uptake and utilization of rice in Poyang Lake Basin were studied. The results showed that under the condition of equivalent phosphorus input, the total amount of phosphorus accumulation increased with the increase of nitrogen application rate. Intermittent irrigation inhibited the accumulation of phosphorus in the middle and early stages of rice growth and promoted the accumulation of phosphorus , Increased the amount and proportion of phosphorus translocation and proportion of stems and sheaths and increased amount of spike phosphorus. Under intermittent irrigation and conventional flooding, nitrogen application (basal fertilizer: tillering fertilizer: panicle fertilizer = 5: 3: 2) could increase total phosphorus accumulation and spike Increase in phosphorus. Under the experimental conditions, the total amount and yield of phosphorus accumulation in different combinations of water management and nitrogen fertilizer operation were W1N2F (2-water intermittent irrigation, 180 kg / hm2 of nitrogen fertilizer, basal fertilizer: tillering fertilizer: panicle fertilizer = 5: 3: 2) the highest combination. Can be seen after nitrogen fertilizer is conducive to promoting rice’s absorption and utilization of phosphorus.