【目的】探讨供P和Zn对小麦与黑麦P-Zn关系以及小麦籽粒中锌与植酸含量的影响,为通过农艺措施提高小麦籽粒Zn含量及其生物有效性提供理论依据。【方法】在螯合-缓冲营养液中分别添加0.1,0.6,3.0,6.0mmol/LP及0,3.0μmol/LZn,采用营养液培养方法对小麦和黑麦进行了培养试验,分别在培养72和45d收获小麦、黑麦,测定根部与地上部的干质量,P、Zn含量以及小麦籽粒的植酸含量,研究P及Zn对小麦、黑麦生长及养分吸收、分配的影响。【结果】供Zn后,小麦籽粒Zn含量、Zn吸收量分别是不供Zn处理的2.74和3.64倍,植酸含量及植酸与Zn物质的量比分别降低了9.64%和68.19%,供Zn还增加了小麦籽粒干质量,提高了小麦籽粒中的P含量,促进了P向籽粒中转运,同时也提高了籽粒中Zn的分配率;供Zn与否对小麦生长和黑麦地上部生长没有显著影响,但供Zn显著抑制了黑麦根部的生长。小麦、黑麦根部存在明显的P-Zn拮抗作用,但在相同环境中,黑麦根部对Zn的摄取能力明显较小麦强。小麦籽粒中植酸含量随着P供应浓度的增大而增加;过量供P抑制了小麦和黑麦对Zn的吸收,阻碍了Zn向小麦籽粒中转运;小麦籽粒中P的分配...
【Objective】In order to offer some theory to improve Zn concentration and its bioavailability of wheat grain through agronomy approach,the effects of Zn and P fertilization on the relationship of P and Zn of wheat and rye and on the concentration of phytic acid of wheat grain were investigated.【Method】A culture experiment was conducted in chelater-buffered solution which was added 0.1,0.6,3.0,6.0mmol/L P and 0,3.0μmol/L Zn;wheat and rye were harvested after 72 and 45d,respectively;the dry weight and P and Zn...