几种葡萄砧木及其与赤霞珠嫁接组合磷效率比较

Comparison of Phosphorus Efficiency on Different Rootstocks and Their Grafted Seedlings with Cabernet Sauvignon

以葡萄砧木101-14M、5BB、1103P、Beta及其与赤霞珠(CS)嫁接组合苗为试材,研究砧木磷吸收动力学及磷效率。试验结果表明,不同砧木根系对磷的吸收能力顺序为1103P>Beta>101-14M>5BB。赤霞珠(CS)与不同砧木嫁接,在正常供磷和低磷胁迫(正常供磷的20%)下,嫁接组合CS/1103P的根系长度、根系表面积、根系体积都明显高于其他3种组合。低磷胁迫下,CS/1103P的根系长度分别比CS/101-14M、CS/Beta和CS/5BB高出24.53%、22.22%、33.60%,根系表面积分别高出22.77%、30.72%、34.28%;根系体积分别高出23.10%、36.92%、33.35%。正常供磷时,CS/1103P组合吸磷量分别比CS/101-14M、CS/Beta及CS/5BB高出32.08%、40.31%、27.19%;低磷胁迫下,吸磷量比其它3种组合更高,分别高出了47.35%、44.64%、36.90%。CS/1103P组合植株生物量显著高于其他3种组合,可以确定1103P为磷高效基因型砧木,可在缺磷地区应用。

101-14M,5BB,1103P,Beta and Cabernet Sauvignon(CS)grafting were chosen as test materials to study the absorption kinetics of phosphorus and efficiencies of phosphorus. The results showed that,absorption efficiencies of different rootstocks on phosphorus were 1103P > Beta > 101-14M > 5BB. Cabernet Sauvignon(CS)grafted on different rootstocks. Under normal P-supply and P-deficiency(20% of normal P-supply),the root length,root surface area,root volume of CS/1103P were significantly higher than the other three combinations,under the phosphorus stress,the root length of CS/1103P was higher than CS/101-14M,CS/Beta and CS/5BB respectively 24.53%、22.22%、33.60%;The root surface area of CS/1103P was higher than the other three respectively 22.77%,30.72%,34.28%;The root volume of CS/1103P was higher than the other three respectively 23.10%,36.92%,33.35%. Under normal P-supply,the phosphorus uptake of CS/1103P was higher than CS/101-14M,CS/Beta and CS/5BB respectively 32.08%,40.31%,27.19%;Under the stress of low phosphorus,the phosphorus uptake of CS/1103P was higher than the other three respectively 47.35%,44.64%,36.90%. The plant biomass of CS/1103P was significantly higher than the other three combinations. So we can concluded that 1103P is P-efficient root stock,which can be applied in phosphorus deficiency or soil.