摘要
以超高产小麦品种烟农1212为试材,在微喷带测墒补灌条件下设置0(N0)、180(N1)、210(N2)、240(N3)kg/hm^2四个施氮量,研究其对小麦耗水特性及籽粒产量的影响。结果表明:(1)N2处理100~200cm土层土壤贮水消耗量显著高于N3处理,提高了深层土壤贮水的利用能力;(2)N2处理播种—拔节期阶段耗水量显著低于N3,但拔节—开花期及开花—成熟期阶段的耗水量及耗水模系数显著高于N3和N1处理;(3)籽粒产量N2较N1提高了12.35%,与N3无显著差异;N2处理氮肥农学效率及氮肥偏生产力显著高于N3处理。因此施氮量210 kg/hm^2为本试验条件下的适宜施氮量。
The super high-yielding wheat variety Yannong 1212 was used as the test material. The effects of nitrogen application rates on water consumption and wheat grain yield of wheat were studied at four rates of 0（N0）,180（N1）,210（N2） and 240（N3） kg/hm^2. The results showed that water consumption amount in 100～ 200 cm soil layers of N2 treatment was significantly higher than that of N3,which showed an increased capability to absorb soil water from deep soil layers. From sowing to jointing stage,N2 treatment obtained the significant lower periodical water consumption in comparison of that in N3 treatment. However,the water consumption and water consumption percentage were significantly higher than those of N3 and N1 treatment from jointing to anthesis and from anthesis to maturity stage. The grain yield of N2 treatment increased by12. 35% compared to N1 treatment,but no significant difference in N3 treatment. The nitrogen fertilizer efficiency and nitrogen fertilizer partial productivity of N2 treatment were significantly higher than that of N3.Therefore,210 kg/hm^2 was proposed as the optimal nitrogen application rate under this test conditions.
作者
史辛凯
石玉
赵俊晔
于振文
Shi Xinkai;Shi Yu;Zhao Junye;Yu Zhenwen(Key Laboratory of Crop Ecophysiology and Farming System, Ministry of Agriculture, Shandong Agricultural University,Taian 271018, China;Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China)
出处
《山东农业科学》
2018年第5期72-75,共4页
Shandong Agricultural Sciences
基金
国家自然科学基金项目(31771715
31601243)
农业部现代小麦产业技术体系项目(GARS-3-1-19)
关键词
冬小麦
施氮量
耗水特性
氮素利用
Winter wheat
Nitrogen application rate
Water consumption
Nitrogen utilization
