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盐渍化农田不同施氮水平对向日葵SPAD值的影响 被引量:1
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作者 裴承忠 马韬 +4 位作者 刘聪 李琦 付峰 伍靖伟 黄介生 《中国土壤与肥料》 CAS CSCD 北大核心 2016年第6期111-115,共5页
以内蒙古河套灌区主要经济作物向日葵为研究对象,对不同盐渍化程度( S0:〈0.25%, S1:0.25%-0.5%, S2:〉0.5%)和施氮量( N)水平( N0:0 kg/hm2、 N1:90 kg/hm2、 N2:135 kg/hm2、 N3:180 kg/hm2)下向日葵相对叶绿素含量... 以内蒙古河套灌区主要经济作物向日葵为研究对象,对不同盐渍化程度( S0:〈0.25%, S1:0.25%-0.5%, S2:〉0.5%)和施氮量( N)水平( N0:0 kg/hm2、 N1:90 kg/hm2、 N2:135 kg/hm2、 N3:180 kg/hm2)下向日葵相对叶绿素含量( SPAD值)在不同生育期的变化特征进行分析。结果显示, SPAD值可以反映出向日葵的氮素供给状况,其在蕾期和花期与地上部分干物质量(蕾期R=0.576,花期R=0.655)和籽粒产量(蕾期R=0.774,花期R=0.758)均有显著的相关关系。向日葵SPAD值在不同生育期受到盐分和施氮量水平不同程度的影响。在轻度盐渍化程度( S0)下, N1水平施氮量下的SPAD值在进入蕾期后均仅次于N3水平,该水平的施氮量可满足该环境中向日葵的生长;在中度盐渍化程度( S1)下,当施氮量水平从N1增加到N2时, SPAD值有明显的增加。在重度盐渍化程度( S2)下,各施氮肥处理的SPAD值相比于不施氮肥的N0水平,不仅没有显著上升,反而有部分出现明显下降。据此,提出了针对不同盐渍化程度农田的推荐向日葵氮肥施用量( S0:90 kg/ hm2, S1:135 kg/hm2, S2:0 kg/hm2),为经济合理地施用氮肥提供依据。 展开更多
关键词 向日葵 盐分 施氮量水平 SPAD值
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Effect of Nitrogen Fertilizer on the Accumulation and Distribution of Dry Matter in Broomcorn Millet 被引量:8
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作者 Ling CHEN Zhijun QIAO +3 位作者 Junjie WANG Haigang WANG Xiaoning CAO Junli DONG 《Agricultural Science & Technology》 CAS 2015年第7期1425-1428,共4页
[Objective] To understand the effect of nitrogen application on dry matter accumulation and allocation dynamics in broomcorn millet. [Method] The accumulation and distribution of dry matter were studied using cultivar... [Objective] To understand the effect of nitrogen application on dry matter accumulation and allocation dynamics in broomcorn millet. [Method] The accumulation and distribution of dry matter were studied using cultivars Jin Shu 7 and Huang Mizi at different levels of nitrogen fertilizer at the jointing stage. [Result] The results showed that increasing N application led to the increase of green leaf area and the delay of leaf senescence, which was beneficial to the accumulation of dry matter.Appropriate nitrogen application(90 kg/hm2) could coordinate the translocation rate of dry matter among different plant parts, thereby enhancing the yield of broomcorn millet; among different organs, the contribution rate of stem to kernel was greater than that of leaf to kernel; there was obvious correlation between dry matter and yield. For Jin Shu 7, leaf area and dry weight of spike showed significant negative correlation with yield. [Conclusion] The formation of grain yield of broomcorn millet involved the accumulation and allocation of dry matter, the appropriate amount of nitrogen application(90 kg/hm2) could improve the rates of translocation and contribution of dry matter, thereby promoting the yield of broomcorn millet. 展开更多
关键词 Nitrogen application Broomcorn millet Dry matter accumulation Alloca-tion rate
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The Effect of N-Fertilization on Rosmarinus Officinalis L. (An Upright Variety) Yield in Central Greece
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作者 Eleni Wogiatzi-Kamwoukou Nickolaos Gougoulias +2 位作者 Zoi Papadouli Baia Theodosiou Kyriakos D Giannoulis 《Journal of Food Science and Engineering》 2017年第3期141-146,共6页
The effect of three different N-fertilization levels (NI: 625, N2:385 and N3:770 kg hal; where in case of N1 was used the 3-6-10+3MGO+30% OM and in cases of N2-N3 the 26-0-0 fertilizers) on fresh and dry weight... The effect of three different N-fertilization levels (NI: 625, N2:385 and N3:770 kg hal; where in case of N1 was used the 3-6-10+3MGO+30% OM and in cases of N2-N3 the 26-0-0 fertilizers) on fresh and dry weight of the perennial Rosmarinus officinalis (upright cultivar) was investigated during the 2nd year after establishment at the Experimental Farm of the Technological Educational Institute of Thessaly in Greece (TEI; Larissa plain) in 2015. It is well documented that the crop reaches its potential yield on the third year of cultivation and continues producing biomass for as long as eight years. Complete weather data (air temperature, radiation, air humidity, precipitation) were recorded hourly in an automatic meteorological station, which was installed to the experimental farm of TEI. Upon harvest (November 3rd 2015), the crop reached a maximum fresh yield of 11.67 tons per hectare and dry yield of 4.3, respectively. The average fresh weight was 8.2, 8.4 and 8.9 t hal and the dry weight were 2.6, 3.1 and 3.2 t ha-1 for the N1, N2 and N3 levels, respectively. Furthermore the higher moisture content was observed in the case of N1 level (68%). Therefore, the above data show that rosemary cultivation could be a promising alternative crop, especially in case of the consideration that average selling price of dry rosemary in Greece is 3.5 ∈ kg^-1 and the average gross income exceeds the amount of 10,000 ∈ ha^-1. 展开更多
关键词 Rosmarinus officinalis L. FERTILIZATION upright variety fresh yield dry yield.
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Effects of Nitrogen Fertilization on Growth and Development and Nitrogen Utilization of Japonica Super Rice
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作者 Yuefeng CUI Guocai SUN +2 位作者 Tiegang LU Xiaoqiu WU Helin LUAN 《Agricultural Science & Technology》 CAS 2017年第2期250-255,共6页
With the super japonica rice Shennong 265 as the tested material, the effects of different nitrogen application amounts and basic tiller fertilizer(BTF)-ear granule fertilizer(EGF) ratios on the yield and nitrogen uti... With the super japonica rice Shennong 265 as the tested material, the effects of different nitrogen application amounts and basic tiller fertilizer(BTF)-ear granule fertilizer(EGF) ratios on the yield and nitrogen utilization characteristics of Shennong265 were investigated. The results showed that when the BTF-EGF ratio was 8:2 or 7:3, the yield of Shennong 265 increased with the increased nitrogen application amount; when the BTF-EGF ratio was 6:4, medium nitrogen level was more conducive to improving the yield of Shennong 265; under the condition of same BTF-EGF ratio, with the increased nitrogen application amount, the total nitrogen uptake increased, and the nitrogen physiological efficiency and harvest index decreased. At low and medium nitrogen levels, the higher the proportion of EGF was, the higher the yield, total nitrogen uptake and nitrogen recovery ratio were; at high nitrogen level, the BTF-EGF ratio of 7:3 was more favorable; at the same nitrogen level, the higher the proportion of EGF was, the lower the nitrogen physiological efficiency and harvest index were. Under conditions of nitrogen application level of 255 kg/hm^2 and BTF-EGF ratio of 7:3, the dry matter accumulation in the leaves, stems and spikes of Shennong265 was higher in the late growth period. Higher effective panicle number and grain number per panicle led to higher yield(9581.5 kg/hm^2, 2.4%-20.1% higher than those in the other treatment groups) and higher nitrogen use efficiency. 展开更多
关键词 Nitrogen application RICE YIELD Nitrogen use
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