超级杂交稻抗倒生理与形态机能研究Ⅰ.培矮64S/E32与汕优63植株钾、硅和纤维素含量差异

Resistant Physiology to Lodging and Morphological Characters of Super Hybrid Rice Ⅰ.Differences of Si, K and Fiber Contents of the Plant between Pei’ai64S/E32 and Shanyou63

为了研究超高交水稻最大承载能力 ,比较了超级杂交稻苗头组合培矮 6 4S/ E32较三系高产杂交组合汕优6 3在植株钾、硅和纤维素等方面的诸多差异 :超级杂交稻植株钾、硅和纤维素总量表现出明显的优势 ;比较其干重百分率 ,两组合钾差异不显著 ,但超级杂交稻茎节间硅和纤维素含量具有优势 ;超级杂交稻齐穗后节间的钾和硅淀积作用明显 ,叶片的钾撤退相对较少 ;高肥条件下超级杂交稻植株钾、硅和纤维素总量因其干重增加而增多 ,其中叶鞘各要素的增重十分明显 ,高肥条件下干重百分率普遍下降 。

Differences in K,Si and fiber contents between super hybrid Pei’ai64S/E32 and 3 line combination Shanyou63 were found as follows: super hybrid has the significant dominance in total quantity of K, Si and fiber; there is not obvious difference in the rate of dry matter of K between the two hybrids, while Si in node and fiber both in node and sheath remain significant dominace in super hybrid; super hybrid accumulates more K and Si after heading stage,and not much K decreases in leaves;the quantity of K,Si and fiber in super hybrid increase under sufficient fertilizer conditions, esp.in the sheath, while the percentages of all elements decrease with the percentage of Si dropping the most.