| 陈玲,田霄鸿,李峰,李生秀.供锌和添加碳酸钙对不同基因型小麦幼苗生长及锌磷吸收的影响[J].干旱地区农业研究,2006,(6):11~16 |
| 供锌和添加碳酸钙对不同基因型小麦幼苗生长及锌磷吸收的影响 |
| Effect of supplying CaCO3 and Zn in the nutrient solution on growth and Zn、P uptake of winter wheat plants of five genotypes |
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| DOI：10.7606/j.issn.1000-7601.2006.06.03 |
| 中文关键词: 碳酸钙 锌 小麦基因型 生物量 磷 磷锌比 |
| 英文关键词:CaCO3 Zn genotypes of winter wheat biomass P P/Zn |
| 基金项目:国家自然科学基金重点项目(30230230)； 面上基金(40471069)； 农业部“948”重大研究项目(2003-Z53) |
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| 中文摘要: |
| 以Hoagland营养液为介质,在不同Zn与CaCO3用量下,将以下5种基因型冬小麦进行营养液混合培养,探讨小麦幼苗生长及Zn与P吸收的状况。根据生长量及缺Zn症状的严重程度,把S02-8、远丰998判定为缺Zn敏感型,而中育6号、小偃22及西杂1号为缺Zn非敏感型;适量供Zn比高量供Zn更有利于小麦生长;低量Ca-CO3可在一定程度上促进小麦幼苗生长而高量CaCO3会抑制生长,缺Zn敏感型的生长量显著低于非敏感型,且前者的根冠比小于后者。加入CaCO3后对小麦植株Zn、P吸收的影响较小,但地上部P/Zn随CaCO3添加量的增加而递减。根系与地上部含Zn量与吸收量均随供Zn量的增加而增加,而高量供Zn时Zn在根部大量累积,同时高Zn用量在一定程度上抑制小麦植株对P的吸收,P/Zn随Zn用量的增加而降低。与不供Zn相比,高量供Zn显著降低了小麦植株根系及地上部的P/Zn值,而低量供Zn时,地上部的P/Zn仅有轻微的降低。供试的5种基因型小麦的P含量均未超过P中毒临界值,因此小麦幼苗出现的缺Zn症状与P无关。相对于缺Zn非敏感型小麦,缺Zn敏感型更易于在根系中累积Zn,吸P量较低,且地上部P/Zn较高。 |
| 英文摘要: |
| In order to investigate the effects of supplying rates of calcium carbonate(0,10,30,60 mg/L) and zinc(0,0.016,0.082 mg/L) supplied in the nutrient solutions on wheat seedlings growth,zinc and phosphorus uptake,winter wheat plants of five genotypes were mix-cultured in Hoagland nutrient solution.Based on the biomass and the severity extent of Zn deficiency symptoms of five genotypes,S02-8 and Yuanfeng 998 was classified to susceptibility-types to Zn deficiency,and Zhongyu 6,Xiaoyan 22 and Xiza 1 were non-susceptibility types.Supplying Zn with low rate was more favorable for growth of wheat plants;Addition of CaCO3 with low rates could promote the development of wheat plants to some extent,whereas,addition with high rate inhibited the growth.The biomass of roots and shoots for wheat plants of susceptibility types were significantly lower than that of non-susceptibility types,and also the ratios of root to shoot of the former were obviously lower than that of the latter.Adding CaCO3 in the nutrient solution had little influence on Zn and phosphorus uptake by various wheat genotypes,but P/Zn ratios of shoot decreased with increasing CaCO3 additions.With increasing Zn rates Zn uptake by roots and shoots of wheat plants increased,but P/Zn ratios were decreased,and at the high rate of zinc supply Zn was easily accumulated in the roots,but at the same time P uptake was inhibited.In comparison with no supplying Zn,supplying Zn at high rate significantly decreased P/Zn ratios of roots and shoots of wheat plants,whereas,supplying Zn at low rate only slightly decreased the P/Zn ratios of shoots.All phosphorus concentrations of wheat plants of five genotypes tested were lower than the critical value of P toxication, therefore,it was no doubt that Zn deficiency symptom occurred had no relationship with P.Comparing with non-susceptibility type,the wheat plants of susceptibility types easily accumulated zinc in roots,P uptake was relatively low,and P/Zn ratio of shoot was higher. |
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