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开放式增温与不同施氮量对冬小麦镁吸收的影响

时间:2018-08-10 09:26来源:毕业论文
对冬小麦进行花前夜间增温和氮肥处理,研究土壤及植株体内镁含量的变化【处理】供试品种为扬麦13,采取开放式主动增温装置,设置未增温对照及花前夜间增温处理俩个温度处理,和

摘要:【目的】对冬小麦进行花前夜间增温和氮肥处理,研究土壤及植株体内镁含量的变化【处理】供试品种为扬麦13,采取开放式主动增温装置,设置未增温对照及花前夜间增温处理俩个温度处理,和纯氮量分别为150 kg•ha-1、225 kg•ha-1、375 kg•ha-1三个氮肥处理【结果】花前夜间增温和氮肥施用对土壤中交换态镁含量无影响,对冬小麦茎鞘、叶片、穗中的镁含量的影响分别为无影响、降低和提升【结论】花前夜间增温和施氮量对土壤中交换态镁含量及冬小麦茎鞘中的镁含量无明显影响;对叶片中的镁含量有降低作用,施氮量在225kg▪ha-1和375kg▪ha-1 时表现显著,增温是主要影响因素;对穗中的镁含量有提升作用,施氮量在150 kg▪ha-1和225kg▪ha-1时表现显著,增温是主要影响因素。26815
毕业论文关键词:夜间增温;施氮量;冬小麦;镁
Effects of Open Temperature and Different Nitrogen Rates on Magnesium Uptake of Winter Wheat
Abstract:[Objective] To simulate the future warming of the global warming, the winter wheat temperature and nitrogen fertilizer treatment of winter wheat, soil and winter wheat plants in the body of magnesium changes in the treatment of the test varieties for the Yang Mai 13, to take (NT), from sowing to flowering every day 18: 00-6: 00 uninterrupted warming) two temperature treatment, and pure Nitrogen content of 150 kg • ha-1,225 kg • ha-1,375 kg • ha-1 three nitrogen fertilizer treatment [results] 1. before the night temperature and nitrogen fertilizer application of the soil exchange of effective magnesium content The effects of nocturnal warming and nitrogen application on the contents of magnesium in stem and sheath, leaf and ear of winter wheat were not affected, and the contents of magnesium in the leaves of winter wheat were not significantly affected. And the effect of nitrogen fertilizer on the growth of winter wheat was studied. The effects of nitrogen fertilizer on the growth of winter wheat were studied. The effects of nitrogen fertilizer on the growth of winter wheat were studied. absorb Significantly affected. [Write no, too general, you can use the final conclusion of your article, or write like that] before the night temperature and nitrogen application rate of soil exchangeable magnesium content and winter wheat stem and sheath in the magnesium content had no significant effect; The content of nitrogen in leaves was decreased, and the amount of nitrogen applied was significant at 225kg •ha-1 and 375kg •ha-1. The warming was the main influencing factor, and the content of magnesium in the panicle was improved. 150 kg • ha-1 and 225 kg • ha-1 , and the warming was the main influencing factor. 源¥自%六^^维*论-文+网=www.lwfree.cn
Key words:Night Temperature; Amount of nitrogen applied; winter wheat; magnesium
目  录
摘要1
关键词1
Abstract1
Key words1
引言1
1材料与方法3
1.1试验区概况 3
1.2处理与材料 3
1.2.1试验处理方法3
1.2.2试验材料3
1.3测定项目及方法3
1.3.1各生长时期时土壤中镁素(交换态)含量的测定3
1.3.2 各生长时期时植株体镁素含量的测定4
1.3.3 温度测定 4
1.3.4 土壤水分测定 4
1.4数据处理分析4
2 结果与分析4
2.1试验区土壤增温对比 4
2.2土壤含水量对比 4
2.3土壤中镁素(交换态)含量对比 5
2.4植株体内镁素含量对比6
3讨论 8
3.1增温和氮肥施用对土壤中交换态镁的影响 8
3.2增温和氮肥施用对小麦茎鞘、叶片、穗中镁的影响 8
4结论 9
致谢9
参考文献9
开放式增温与不同施氮量对冬小麦镁吸收的影响
引言:近年来,随着日益变暖的全球气候以及土壤的不平衡施肥,我国的土壤缺镁现象愈加凸显[1]。水土流失,降雨量大,土壤酸性、砂质,红、黄壤,氮、磷、钾等化学肥料的过量施用,这些因素都是直接导致土壤中镁元素愈发不足的原因。我国虽然是农业大国,人们开始对镁在植物生长过程中的重要性有所认识,但实际生产中镁肥的施用量还是甚微。近年来,因为不科学的施肥、灌溉措施和耕种制度,和长期的高产连作等,土壤中镁元素的消耗愈发严重,土壤中镁元素匮乏的问题开始逐渐暴露,植物因镁胁迫而呈现出的缺素症状也愈来愈突出。最近的调查研究表明,我国土壤缺镁面积约占全国耕地总面积的6%[2],可见镁元素的缺失,已经上升为了我国农业生产过程中一个迫在眉睫的严重问题。 开放式增温与不同施氮量对冬小麦镁吸收的影响:http://www.lwfree.cn/shengwu/20180810/21105.html
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