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湖南省高校创新平台开放基金(13K061)

作品数:3 被引量:10H指数:2
相关作者:黄维彭建伟王娟王刚蔡桂青更多>>
相关机构:湖南农业大学湖南生物机电职业技术学院更多>>
发文基金:湖南省高校创新平台开放基金湖南省自然科学基金国家科技支撑计划更多>>
相关领域:农业科学化学工程更多>>

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Effects of Cadmium Stress on Key Enzymes Involved in Nitrogen Metabolism and Nitrogen,Phosphorus, Potassium Accumulation of Different Varieties of Rice
2015年
In this study, the pot experiment was used to explore the differences of activity of key enzymes involved in N metabolism and NPK accumulation under Cd stress during the til iering stage of differen varieties of rice. The results showed that:Cd stress could increase the NPK concentration of different rice type in the til ering stage, while Shen-Liangyou 5867,Yongyou 5550 and Wu-Yunjing 27 showed the highest amplification respectively. Morever, Cd stress can also contribute to the ac-tivity of NR,GS,GOGAT increasing.A s for NR,the Cd stress significantly contribute to NR activity increasing of Huang-Huazhan and Yongyou 538 but is not significant for Wu-Yunjing 27, Shen-Liangyou 5867 and Yongyou 5550, however, the difference among them is not obvious.However, for the activity of GS , Cd stress promote the GS activity. Huang-Huazhan and Wu-Yunjing 27 with low activity in Cd normal level are the most sensitive. Meanwhile the difference between two treatment is the most significant. To the contrary, restrain the GS activity of Shen-Liangyou 5867, Yongy-ou 5550 and the difference is not significant. And under Cd stress, either difference reached significant in GS activity. Cd stress also improve the activity of GOGAT, Wu-Yunjing 27 showed the highest inprovement which showed the lowest GOGAT activity under Cd normal level. Cd stress on rice growth and development of ad-verse, make its lower seed setting rate, 1 000 grain weight decreased, resulting in different degrees of reduction of output of rice.
黄维彭建伟龚蓉庹海波范艳咪
关键词:RICE
施氮量和栽插密度对晚稻产量与氮肥利用率的影响被引量:5
2015年
氮肥施用量过高和栽插密度越来越小,严重制约着水稻的高产和氮肥利用率的提高。为探明氮肥施用量和栽插密度对晚稻产量的影响及互作效应,以‘天优华占’为试验材料,设置5个不同氮肥施用量与3个栽插密度15个处理的大田小区试验,分析氮肥用量和栽培密度的互作对水稻产量和氮肥利用率的影响。结果表明:不同施氮量处理间晚稻产量的差异呈显著水平,晚稻施氮量为200 kg/hm2时,其籽粒产量高于其他处理,且差异显著;不同栽插密度处理间的产量有差异,随着栽插密度的增加,产量有所增加。有效穗数对晚稻产量的影响最大,每穗粒数次之,千粒重和结实率最小。本试验条件下,晚稻高产最佳组合为施氮量200 kg/hm2与密度30万穴/hm2;氮肥利用率最高的组合则是施氮量50 kg/hm2与密度30万穴/hm2。因此考虑到产量和经济效益,在本试验条件下认为施氮量为200 kg/hm2与密度为30万穴/hm2的组合为最适宜处理。
曾宪军蔡桂青田昌王娟黄维彭建伟
关键词:晚稻施氮量栽插密度氮肥利用率
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