不同形态氮肥和抽穗期土壤水分对不同水稻品种氮素吸收利用的影响  被引量:2

Effects of Nitrogen Fertilizer Form and Soil Water Potential at Heading Stage on Nitrogen Uptake and Utilization of Different Rice Varieties

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作  者:孙园园[1,2] 孙永健[2,3] 杨志远[2,3] 秦俭[2,3] 徐徽[2,3] 马均[2] 

机构地区:[1]中国气象局成都高原气象研究所,四川成都610072 [2]四川农业大学水稻研究所,四川温江611130 [3]农业部西南作物生理、生态与耕作重点实验室,四川温江611130

出  处:《杂交水稻》2013年第2期68-74,共7页Hybrid Rice

基  金:国家自然科学基金项目(31101117);中国气象局西南区域气象中心区域重大项目(2010-7);国家粮食丰产科技工程项目(2011BAD16B05);四川省教育厅项目(10ZA047);四川省育种攻关专项

摘  要:以4个不同类型水稻品种为材料,设置3种铵硝配比处理和2种水分处理,研究了不同形态氮肥和抽穗期土壤水分对水稻氮素吸收利用的影响。结果表明,水稻各生育时期的植株氮素积累量和氮肥回收效率均随氮肥中铵态氮比例的降低而降低;与抽穗期土壤水势为0 kPa的处理相比,适度水分胁迫(土壤水势-25 kPa)可提高产量、收获指数、各生育时期的植株氮素积累量及氮肥回收效率,但是降低了氮素干物质生产效率和氮肥农艺效率;在适度水分胁迫下适当增硝(铵硝配比50∶50)能进一步提高水稻产量和收获指数,还有利于提高氮素稻谷生产效率和氮肥农艺效率。Using four different types of rice varieties including Gangyou 527 (an indica hybrid rice), Yangdao 6 (an indica inbred rice), Zhonghan 3 (a japonica upland rice) and Nongken 57 (a japonica inbred rice) as the materials, three ammonium/nitrate ratios (ANR) (100: 0, 50:50 and 0: 100) of nitrogen fertilizers and two soil water potentials (0 and -25 kPa) at heading stage were designed to study the effects of nitrogen fertilizer form and soil water potential on nitrogen uptake and utilization of different rice varieties. The results showed that the N con- tent per plant (NCP) and N recovery efficiency (NRE) decreased with the decrease of ANR in all growing stages from tillering to maturing. Compared with the 0 kPa soil water potential (SWP) treatment, the -25 kPa SWP treatment with a moderate water stress at heading stage could increase grain yield, harvest index, NCP and NRE in all growing stages but decrease the N dry matter production efficiency (NDMPE) and N agronomy efficiency (NAE). In addition, under moderate water stress conditions, a proper addition of nitrate nitrogen ( NO3- ) ( ANR =50: 50) could increase rice yield and harvest index and raise the N grain production efficiency (NGPE) and NAE, too.

关 键 词:水稻 氮素形态 适度水分胁迫 氮素吸收利用 产量 

分 类 号:S511.06[农业科学—作物学] S143

 

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