为了推动油用牡丹产业的发展,优化油用牡丹种植技术。以油用牡丹“凤丹”作为试验材料,在聊城大学农学院植物种植园和试验室内进行采集、试验分析,利用不同氮素添加水平:不施氮(N0),施氮5 kg N/hm~2(N1)、10 kg N/hm~2(N2)、15 kg N/hm~...为了推动油用牡丹产业的发展,优化油用牡丹种植技术。以油用牡丹“凤丹”作为试验材料,在聊城大学农学院植物种植园和试验室内进行采集、试验分析,利用不同氮素添加水平:不施氮(N0),施氮5 kg N/hm~2(N1)、10 kg N/hm~2(N2)、15 kg N/hm~2(N3)、20 kg N/hm~2(N4)和25 kg N/hm~2(N5)对牡丹幼苗进行处理,得到了根系性状的数据表明:适量增施氮肥,可有效提高幼苗根系同化物积累量,过量增施氮肥又呈下降趋势;随着氮素的增加,根系总表面积、磷素含量、根尖数和分叉数均表现不同程度先升高后降低的趋势;幼苗根系氮素含量随着施氮量的增加前期上升缓慢、中期无明显差异、后期上升迅速,总体呈不断上升的趋势。因此,为保证“凤丹”牡丹幼苗根系吸收能力和正常发育,进而促进“凤丹”牡丹稳产高产,最佳的施氮量为10 kg N/hm~2(N2)。展开更多
Camptotheca acuminata seeds were sown in sterilized sands in the greenhouse in February of 2005. After 90-day growth, seedlings were inoculated with three species of arbuscular mycorrhizal fungi （AMF）, Acaulospora m...Camptotheca acuminata seeds were sown in sterilized sands in the greenhouse in February of 2005. After 90-day growth, seedlings were inoculated with three species of arbuscular mycorrhizal fungi （AMF）, Acaulospora mellea, Glomus diaphanum and Sclerocystis sinuosa.. The height, biomass, and absorptions of nitrogen and phosphorus of C. acuminata seedlings inoculated with AMF were investigated. The results showed that the formation of AM promoted the height growth and biomass accumulation of seedlings significantly and improved the absorption of phosphorus in seedlings. The height and biomass of mycorrhizal seedlings were 1.2 and 1.6 times higher than those of the non-mycorrhizal seedlings. The absorption of nitrogen was less influenced by the formation of AM. The nitrogen content in mycorrhizal seedling was equal to that of non-mycorrhizal seedlings. Compared with non-mycorrhizal seedlings, the nitrogen content of mycorrhizal seedlings inoculated with A. mellea changed considerably in the root, stem and leaves. The difference in nitrogen content was not significant between mycorrhizal seedlings inoculated with G. diaphanum and S. sinuosa. The AM formation stimulated the absorption of phosphorus, especially in roots, and also changed the allocation of nitrogen and phosphorus in different organs of seedlings. Compared with non-mycorrhizal seedlings, the ratio of nitrogen and phosphorus in mycorrhizal roots increased, but reduced in stem and leaves.展开更多
Based on soil monitoring data in nine sites of Jinhu, Xuyi and Hongze counties on the south bank of Hongze Lake from 1982 to 2013, changes in soil p H, total nitrogen（TN） content, available phosphorus content, organ...Based on soil monitoring data in nine sites of Jinhu, Xuyi and Hongze counties on the south bank of Hongze Lake from 1982 to 2013, changes in soil p H, total nitrogen（TN） content, available phosphorus content, organic matter（OM）content and cation exchange capacity（CEC） were analyzed. The results show that due to excessive application of chemical fertilizer in soil on the south bank of Hongze Lake, soil p H reduced by about 2 on average, while TN content and available phosphorus content in soil increased by more than one time and 2-5 times respectively. Soil acidification caused by agricultural production was very serious. In addition, low soil p H resulted in serious loss of soil cation, so that soil CEC in2013 accounted for less than 50% of that in 1982 and affected mineral nutrient metabolism of crops. Therefore, application of calcium, potassium and trace-element fertilizer should be paid more attention to during agricultural production in future.展开更多
文摘为了推动油用牡丹产业的发展,优化油用牡丹种植技术。以油用牡丹“凤丹”作为试验材料,在聊城大学农学院植物种植园和试验室内进行采集、试验分析,利用不同氮素添加水平:不施氮(N0),施氮5 kg N/hm~2(N1)、10 kg N/hm~2(N2)、15 kg N/hm~2(N3)、20 kg N/hm~2(N4)和25 kg N/hm~2(N5)对牡丹幼苗进行处理,得到了根系性状的数据表明:适量增施氮肥,可有效提高幼苗根系同化物积累量,过量增施氮肥又呈下降趋势;随着氮素的增加,根系总表面积、磷素含量、根尖数和分叉数均表现不同程度先升高后降低的趋势;幼苗根系氮素含量随着施氮量的增加前期上升缓慢、中期无明显差异、后期上升迅速,总体呈不断上升的趋势。因此,为保证“凤丹”牡丹幼苗根系吸收能力和正常发育,进而促进“凤丹”牡丹稳产高产,最佳的施氮量为10 kg N/hm~2(N2)。
基金This paper was supported by the Heilongjiang Province Foundation for Distinguished Youth Scholars (JC-02-11)
文摘Camptotheca acuminata seeds were sown in sterilized sands in the greenhouse in February of 2005. After 90-day growth, seedlings were inoculated with three species of arbuscular mycorrhizal fungi （AMF）, Acaulospora mellea, Glomus diaphanum and Sclerocystis sinuosa.. The height, biomass, and absorptions of nitrogen and phosphorus of C. acuminata seedlings inoculated with AMF were investigated. The results showed that the formation of AM promoted the height growth and biomass accumulation of seedlings significantly and improved the absorption of phosphorus in seedlings. The height and biomass of mycorrhizal seedlings were 1.2 and 1.6 times higher than those of the non-mycorrhizal seedlings. The absorption of nitrogen was less influenced by the formation of AM. The nitrogen content in mycorrhizal seedling was equal to that of non-mycorrhizal seedlings. Compared with non-mycorrhizal seedlings, the nitrogen content of mycorrhizal seedlings inoculated with A. mellea changed considerably in the root, stem and leaves. The difference in nitrogen content was not significant between mycorrhizal seedlings inoculated with G. diaphanum and S. sinuosa. The AM formation stimulated the absorption of phosphorus, especially in roots, and also changed the allocation of nitrogen and phosphorus in different organs of seedlings. Compared with non-mycorrhizal seedlings, the ratio of nitrogen and phosphorus in mycorrhizal roots increased, but reduced in stem and leaves.
基金Supported by the Surface Project of Natural Science Research for Higher Education in Jiangsu Province(13KJB210001)Innovation Planning Project for University Students in Jiangsu Province(201310323040Y)Key Technology R&D Program of Huai'an City,Jiangsu Province(SN13049)~~
文摘Based on soil monitoring data in nine sites of Jinhu, Xuyi and Hongze counties on the south bank of Hongze Lake from 1982 to 2013, changes in soil p H, total nitrogen（TN） content, available phosphorus content, organic matter（OM）content and cation exchange capacity（CEC） were analyzed. The results show that due to excessive application of chemical fertilizer in soil on the south bank of Hongze Lake, soil p H reduced by about 2 on average, while TN content and available phosphorus content in soil increased by more than one time and 2-5 times respectively. Soil acidification caused by agricultural production was very serious. In addition, low soil p H resulted in serious loss of soil cation, so that soil CEC in2013 accounted for less than 50% of that in 1982 and affected mineral nutrient metabolism of crops. Therefore, application of calcium, potassium and trace-element fertilizer should be paid more attention to during agricultural production in future.
