【摘要】：為了探討不同水氮耦合處理對小麥根系活力和吸收氮素能力的影響,以多穗型小麥品種西農(nóng)979和大穗型小麥品系2036為材料進(jìn)行營養(yǎng)液培養(yǎng)試驗(yàn),設(shè)置正常水分供應(yīng)、輕度和重度水分脅迫及低氮、中氮和高氮處理,研究了不同水氮耦合對小麥根系形態(tài)、根系吸收面積、根系活力、植株氮素積累量的影響。結(jié)果表明,水分與氮素存在著明顯的互作效應(yīng),重度水分脅迫和低氮處理都會(huì)降低小麥的生物量、根系總吸收面積、活躍吸收面積和活力、氮含量和植株的氮素積累量,低氮處理增加了根長和根冠比。高氮處理的西農(nóng)979根系總吸收面積、活躍吸收面積和活力較低,中氮處理顯著提高,且分別比2036高11%、14%、27%。西農(nóng)979在中氮和高氮處理之間的氮素積累量無顯著性差異。中氮處理下西農(nóng)979的植株氮素積累量比2036高13%~62%。相關(guān)分析表明,小麥的活躍吸收面積、根系活力與植株氮素積累量呈極顯著正相關(guān)(P0.01),和根冠比呈極顯著負(fù)相關(guān)(P0.01)。在輕度水分脅迫下,增加氮素供給能有效提高西農(nóng)979的根系吸收面積和根系活力;過高的氮素不利于2036根系的生長,表明不同基因型小麥的根系活力和生長對不同水氮耦合的響應(yīng)不同。通過適宜的水氮耦合調(diào)控,有利于創(chuàng)造良好的小麥根系形態(tài),提高根系活力及對水分和養(yǎng)分的吸收能力。
[Abstract]:In order to study the effects of different water and nitrogen coupling treatments on root activity and nitrogen uptake ability of wheat, the nutrient culture experiments of Xinong 979 and large spike wheat line 2036 were carried out, and the normal water supply was set up. The effects of water and nitrogen coupling on root morphology, root absorption area, root activity and plant nitrogen accumulation in wheat were studied under mild and severe water stress and low nitrogen, middle nitrogen and high nitrogen treatments. The effects of water and nitrogen coupling on root morphology, root absorption area, root activity and plant nitrogen accumulation were studied. The results showed that there were obvious interaction effects between water and nitrogen. Both severe water stress and low nitrogen treatment could decrease wheat biomass, root total absorption area, active absorption area and activity, nitrogen content and nitrogen accumulation of plant, and the total absorption area of root, active absorption area and activity, nitrogen content and nitrogen accumulation of plant could be decreased by severe water stress and low nitrogen treatment. Low nitrogen treatment increased root length and root-shoot ratio. The total absorption area, active absorption area and activity of Xinong 979 root line treated with high nitrogen were lower than those of middle nitrogen treatment, which were 11%, 14% and 27% higher than those of 2036, respectively. There was no significant difference in N accumulation between middle N and high N treatment in Xinong 979. Under medium nitrogen treatment, the nitrogen accumulation of Xinong 979 was 13% higher than that of 2036, and the nitrogen accumulation of Xinong 979 was 13% higher than that of 2036. The correlation analysis showed that the active absorption area and root activity of wheat were positively correlated with nitrogen accumulation (P0.01) and negatively correlated with root / shoot ratio (P0.01). Under mild water stress, the root absorption area and root activity of Xinong 979 could be effectively increased by increasing nitrogen supply. Too high nitrogen was not conducive to the growth of 2036 roots, indicating that the response of root activity and growth to different water and nitrogen coupling was different in different genotypes of wheat (Triticum aestivum L.). Through the proper water-nitrogen coupling regulation, it is beneficial to create good root morphology, improve root activity and water and nutrient absorption capacity of wheat (Triticum aestivum L.).
【作者單位】： 中國科學(xué)院水利部水土保持研究所/黃土高原土壤侵蝕與旱地農(nóng)業(yè)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(31370425,31501276) 國家科技支撐計(jì)劃項(xiàng)目(2015BAD22B01)
【分類號】：S512.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 熊淑萍;吳克遠(yuǎn);王小純;張捷;杜盼;吳懿鑫;馬新明;;不同氮效率基因型小麥根系吸收特性與氮素利用差異的分析[J];中國農(nóng)業(yè)科學(xué);2016年12期

2 徐國偉;王賀正;翟志華;孫夢;李友軍;;不同水氮耦合對水稻根系形態(tài)生理、產(chǎn)量與氮素利用的影響[J];農(nóng)業(yè)工程學(xué)報(bào);2015年10期

3 邢軍;孫敏;高志強(qiáng);李光;趙紅梅;任愛霞;;氮磷肥對旱地小麥土壤水分與根系特性的影響[J];中國農(nóng)學(xué)通報(bào);2014年06期

4 王麗芳;王德軒;上官周平;;大穗型小麥葉片性狀、養(yǎng)分含量及氮素分配特征[J];生態(tài)學(xué)報(bào);2013年17期

5 王艷哲;劉秀位;孫宏勇;張喜英;張連蕊;;水氮調(diào)控對冬小麥根冠比和水分利用效率的影響研究[J];中國生態(tài)農(nóng)業(yè)學(xué)報(bào);2013年03期

6 戢林;李廷軒;張錫洲;余海英;;氮高效利用基因型水稻根系形態(tài)和活力特征[J];中國農(nóng)業(yè)科學(xué);2012年23期

7 馬富舉;李丹丹;蔡劍;姜東;曹衛(wèi)星;戴廷波;;干旱脅迫對小麥幼苗根系生長和葉片光合作用的影響[J];應(yīng)用生態(tài)學(xué)報(bào);2012年03期

8 李秀芳;李淑文;和亮;文宏達(dá);;水肥配合對夏玉米養(yǎng)分吸收及根系活性的影響[J];水土保持學(xué)報(bào);2011年01期

9 李銀坤;武雪萍;吳會(huì)軍;武其甫;張彥才;李若楠;王麗英;;水氮條件對溫室黃瓜光合日變化及產(chǎn)量的影響[J];農(nóng)業(yè)工程學(xué)報(bào);2010年S1期

10 張洋;翟丙年;;水分脅迫條件下氮素營養(yǎng)對不同冬小麥基因型的生理效應(yīng)[J];麥類作物學(xué)報(bào);2010年03期

【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 高娜;張玉龍;劉玉;廖常健;吳漢卿;張玉玲;鄒洪濤;虞娜;;水氮調(diào)控對小油菜養(yǎng)分吸收、水氮利用效率及產(chǎn)量的影響[J];中國生態(tài)農(nóng)業(yè)學(xué)報(bào);2017年06期

2 許帥;賈美清;孟元;茍娟;黃靜;張國剛;;天津海底吹填淤泥中可培養(yǎng)細(xì)菌對黑麥草種子萌發(fā)及植株生長發(fā)育的影響[J];河北農(nóng)業(yè)科學(xué);2017年02期

3 顧克軍;張傳輝;顧東祥;張斯梅;石祖梁;許博;楊四軍;;水稻秸稈養(yǎng)分垂直分布特征與不同留茬高度下還田養(yǎng)分估算[J];中國土壤與肥料;2017年03期

4 王秀波;上官周平;;干旱脅迫下氮素對不同基因型小麥根系活力和生長的調(diào)控[J];麥類作物學(xué)報(bào);2017年06期

5 徐偉洲;史雷;王小林;劉翠英;劉瓊;亢福仁;;生物有機(jī)液體混合肥對甜高粱根系形態(tài)特征的影響[J];中國農(nóng)學(xué)通報(bào);2017年16期

6 劉鵬;焦曉燕;丁玉川;武愛蓮;王勁松;董二偉;郭s，

本文編號：2463305