【摘要】 2005年10月~2006年6月对冬小麦种群5种不同分布方式,即行距分别为7 cm(A),14 cm(B),24.5 cm(C),(20+40)cm(D),49 cm(E)进行研究,结果表明,随生育进程的推进,叶片水势和渗透势逐渐下降,至5月29日E处理与其他处理间达到极显著差异(F=40.791**和F=9.522**),不同处理的叶片水势日变化呈现明显的“V”型特征,E处理波动幅度最大,14:00的最低值比18:00的最高值低1.09 M Pa;E处理RW C低于其他处理;产量表现为:B>A>D>C>E,其中,B处理与A处理间差异不显著,但显著高于其他处理(P<0.05),E处理极显著低于其他处理(P<0.01);不同处理间随行距加大,分蘖数量和单株小穗数有降低趋势,分析结果表明,产量与分蘖数量、小穗数呈正相关,与千粒重呈负相关。更多还原

【Abstract】 The experiment was carried out during growing seasons from October of 2005 to June of 2006.It included five treatments that were based on plant row spacing A:7 cm,B:14 cm,C:24.5 cm,D:20 cm+40 cm(row widths set at a narrow row of 20 cm and wide row of 40 cm),E:49 cm respectively.Leaf water potential (Ψw) and osmotic potential(Ψs) declined gradually with the crop growth.Ψw and Ψs there were significant difference between E treatment and other treatments(F=40.791** and F=9.522**) on 29 may 2006.The Ψw per day changed as a "V" curve for different treatments.Fluctuant range of E treatment was maximal,the minimum appeared at 14:00,and less 1.09 MPa than its maximum at 18:00 on 13 may 2006.The relative water content of E treatment was lower than other treatments.Yield of crop in order of B>A>D>C>E,there were no significant difference between B and A treatment,but there were significant difference between B and other treatments(P<0.05),and E treatment significantly lower than other treatments(P<0.01).The number of tillers per square meter and spikelet number per spike declined gradually with increasing the crop row spacing.The results showed that yield had a positive with number of tillers and spikelet,and a negative with 1000-kernel weight.更多还原