氮肥用量對一、二期作水稻產量及生育性狀的影響

Effects of Nitrogen Fertilizer Application on Rice Yield and Growth Characteristics in the First and Second Crop Seasons

林再發(Tsay-Fa Lin)

《臺中區農業改良場研究彙報》 61期 (1998/12) Pp. 13-23

https://doi.org/10.6956/BTDAIS.199812.0013

摘要

本試驗在探討二種氮肥用量即每公頃施120及60 kg氮素對水稻生產特性的影響，試驗結果為葉面積指數及稻篙與稻穀之氮素含量以施120 kg比施60 kg為高，但淨同化率及稻篙與稻穀之澱粉含量則相反，另一方面從抽穗期至成熟期稻篙與稻穀之氮素含量減輕及轉移量以施120 kg氮肥的結果比60 kg大，但澱粉含量減輕及轉移卻為相反結果。此外第一期作葉面積指數、稻篙含氮素與澱粉、稻穀含氮素及澱粉量及稻篙之氮素減輕含量比第二期作大，但稻篙澱粉減輕量卻為相反，而第一期作與第二期作氮素及澱粉之轉移作用相差不多。

關鍵字

水稻 ； 葉面積指數 ； 同化作用率 ； 轉移作用

並列摘要

This study was to investigate the differences of production traits on rice by two kinds of nitrogen fertilizer application, which one was applied 120 kg per hectare and the other was 60 kg. The results indicated that the leaf area index and nitrogen contents in the straw and grain of rice for applying 120 kg were larger than those for 60 kg, but the net assimilative rate and starch contents in the straw and grain were to the contrary. On the other hand, the reduction and translocation of nitrogen in straw and grain applying for 120 kg after heading to ripening stage were higher than those for 60 kg, but the results of starch were to the opposite effects. In addition, the leaf area index, the starch contents in straw, the nitrogen and starch contents in grain and the reduced contents of nitrogen in straw in the first crop were larger than those in the second crop. But the reduced contents of starch in the straw were reverse. By the way, the translocations of nitrogen and starch between the first crop and the second crop were similar.

並列關鍵字

rice ； leaf area index ； net assimilative ratio ； translocation