不同氮肥水平对辽星1号和辽优5238产量的影响  

Effect of Different Nitrogen Amount on Yield of Liaoxing 1 and Liaoyou 5238

作　　者：陈盈 隋国民 张满利 侯守贵 于广星 王有芬 李海波 

机构地区：[1]辽宁省稻作研究所,辽宁沈阳110101

出　　处：《辽宁农业科学》2010年第1期10-13,共4页Liaoning Agricultural Sciences

基　　金：辽宁省农业攻关(2008201003);辽宁省稻作研究所青年人才发展基金(DZS-2008-2)

摘　　要：以辽星1号和辽优5238为供试材料，研究了不同氮肥水平对水稻产量的影响。结果表明，与N3处理相比，减少氮肥投人的15％和增加氮肥投入的15％～45％均不能显著影响辽星1号和辽优5238的产量。两个供试品种均以15kgN／667m2为最适施氮量，能够获得较高的经济效益。氮肥农学利用率随施氮量的增加而降低，因而在生产中应避免以高施氮量获得高产。Field experiment was conducted to study the effect of N fertilizer on the yield of japonica cultivar Liaoxing 1 and japonica hybrid cuhivar Liaoyou 5238. The results showed that compared with the N3 treatment the yield of Liaoxing 1 and Liaoyou 5238 did not changed greatly when N fertilizer reduced by 15% or in- creased by 15% -45%. The higher economic benefit was obtained when N fertilizer was applied at 15 kgN/ 667m2, which could be regarded as optimum N fertilizer application rate for both two studied cultivars. Nitro- gen agronomic efficiency decreased with the increase of N fertilizer application amount, thus, it should be a- voided that excessive N fertilizer was applied to obtain high yield.

关 键 词：水稻 氮肥 产量 

分 类 号：S511.062[农业科学—作物学]