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The availability of N also affected the nutritional status of the rice leaf. There was a negative effect on free amino acids and starch content under N-starvation and N-excess. Compared with control nitrogen, N-starvation led to great decreases in the content of nitrogen, carbon and sucrose but it had no significant effect on the content of soluble sugar and total protein, whereas N-excess increased nitrogen, soluble sugar and total protein content, but it had no significant effect on the content of carbon and sucrose. N-starvation increased carbon/nitrogen of the rice leaf compared to control nitrogen, whereas N-excess decrased carbon/nitrogen of the rice leaf as compared to control nitrogen (Table 2). 氮供应水平也影响着水稻叶片的营养状况。在氮饥饿和氮过量条件下水稻叶片的游离氨基酸和淀粉含量均显著降低。与正常施氮相比，氮饥饿条件下，叶片氮素含量、碳含量和蔗糖含量显著降低，可溶性糖和总蛋白含量无显著变化。而氮过量条件下，叶片氮素含量、可溶性糖含量和总蛋白含量显著增加，碳含量和蔗糖含量无显著变化。与正常施氮相比，氮饥饿条件下水稻叶片碳氮比显著增加，氮过量条件下水稻叶片的碳氮比显著降低（表2）。 Root is not only an important organ of a rice which absorption of nutrients and moisture, but also a place where many substances are assimilated, transformed and synthesized. The change of its morphological characteristics has an important impact on the growth and development of rice. Compared with control nitrogen, N-starvation increased root lengt, root volume and root biomass, reduced root number, and had no significant effect on root average diameter. While N-excess inhibited root biomassm, root volume, root lengt and root average diameter, had no significant effect on root number. In addition, Root activity was inhibited to different degrees under N-starvation and N-excess(Table 1). 根不仅是水稻吸收营养和水分的重要器官，也是许多物质被同化，转化和合成的场所。 其形态特征的变化对水稻的生长发育有重要影响。与对照氮相比，N饥饿显著的增加了根长、根体积和根生物量，根数量显著减少，对根平均直径没有显著的影响。N过量显著的抑制根干重、根体积、根长和根的平均直径，对根数量没有显着影响。 此外，在N饥饿和N-过量下，根系活力受到不同程度的抑制（表1）。 |
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818james
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种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:05:34
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:11
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:24
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:53
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:59
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:07:06
fjtony163: 翻译EPI+1, 代发 2018-11-05 09:07:12
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:05:34
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:11
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:24
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:53
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:06:59
种质资源挖掘(fjtony163代发): 金币+50, 代发 2018-11-05 09:07:06
fjtony163: 翻译EPI+1, 代发 2018-11-05 09:07:12
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The availability of N also affected the nutritional status of the rice leaf. There was a negative effect on free amino acids and starch content under N-starvation and N-excess. Compared with control nitrogen, N-starvation led to great decreases in the content of nitrogen, carbon and sucrose but it had no significant effect on the content of soluble sugar and total protein, whereas N-excess increased nitrogen, soluble sugar and total protein content, but it had no significant effect on the content of carbon and sucrose. N-starvation increased carbon/nitrogen of the rice leaf compared to control nitrogen, whereas N-excess decrased carbon/nitrogen of the rice leaf as compared to control nitrogen (Table 2). 氮供应水平也影响着水稻叶片的营养状况。在氮饥饿和氮过量条件下水稻叶片的游离氨基酸和淀粉含量均显著降低。与正常施氮相比，氮饥饿条件下，叶片氮素含量、碳含量和蔗糖含量显著降低，可溶性糖和总蛋白含量无显著变化。而氮过量条件下，叶片氮素含量、可溶性糖含量和总蛋白含量显著增加，碳含量和蔗糖含量无显著变化。与正常施氮相比，氮饥饿条件下水稻叶片碳氮比显著增加，氮过量条件下水稻叶片的碳氮比显著降低（表2）。 Root is not only an important organ of a rice which absorption of nutrients and moisture, but also a place where many substances are assimilated, transformed and synthesized. The change of its morphological characteristics has an important impact on the growth and development of rice. Compared with control nitrogen, N-starvation increased root lengt, root volume and root biomass, reduced root number, and had no significant effect on root average diameter. While N-excess inhibited root biomassm, root volume, root lengt and root average diameter, had no significant effect on root number. In addition, Root activity was inhibited to different degrees under N-starvation and N-excess(Table 1). 根不仅是水稻吸收营养和水分的重要器官，也是许多物质被同化，转化和合成的场所。 其形态特征的变化对水稻的生长发育有重要影响。与对照氮相比，N饥饿显著的增加了根长、根体积和根生物量，根数量显著减少，对根平均直径没有显著的影响。N过量显著的抑制根干重、根体积、根长和根的平均直径，对根数量没有显着影响。 此外，在N饥饿和N-过量下，根系活力受到不同程度的抑制（表1）。 N supply also affected the nutrition of rice leaves. Shortage or excess of N supply reduced free amino acids and starch content significantly. (Compared with control nitrogen,) N-starvation greatly decreased nitrogen, carbon and sucrose content，increased C/N ratio, but had no significant effect on the soluble sugar and total protein content, whereas N-excess enhanced the nitrogen, soluble sugar and total protein content, decreased C/N ratio，and had no meaningful influence on carbon and sucrose content. (Table 2). N supply affected the morphological characteristics of rice roots(, which are a important organ of absorption of nutrients and moisture, and a place where many substances are assimilated, transformed and synthesized). (Compared with control nitrogen, )N-starvation increased the length, volume and biomass but reduced the number of roots, and had no significant effect on root’s average diameter. N-excess inhibited the biomass, volume, length and average diameter of roots, had no significant effect on root’s number. In addition, both N-starvation and N-excess depressed root activity to different degrees(Table 1). |
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