不同耕作方式下春小麦子粒灌浆特性分析

Analysis on Grain Filling Characteristics of Spring Wheat in Different Tillage Treatments

对新疆春小麦品种新春6号在不同耕作方式下的子粒灌浆特性进行了研究。结果表明,不同耕作方式下新春6号的子粒灌浆规律均符合Logistic自然生长曲线。各方程的决定系数R2都在0.998 1以上,均达到显著水平。不同耕作方式可影响子粒各阶段灌浆持续天数T、子粒灌浆速率和粒重。小麦留茬免耕处理渐增期的持续时间明显长于传统耕作;在灌浆各阶段,免耕各处理的灌浆速率均比传统耕作高,在快增期,小麦免耕留茬处理灌浆速率比传统耕作的高7.7%,小麦免耕不留茬处理比传统耕作的高7.4%。因此选择合适的耕作方式,可提高小麦各阶段灌浆速率,对增加粒重、提高产量有重要意义。

In this paper, Grain filling characteristics of spring wheat in different tillage were studied with cultivar （Xinchun 6） in Xinjiang. The results indicated that the change of grain filling characteri-stic of Xinchun 6 was consistent with logistic function in different tillage. Correlation coefficients R2 in equations were above 0.998 1 with significant difference. Effect of different tillage on grain filling period, grain filling rate and grain weight in different grain filling stage was determined. The time with grain filling period in lag phase of no-tillage with wheat stubble was longer than that of convention tillage; In grain filling stags, grain filling rate of no-tillage was higher than that of convention tillage; In linear phase, the grain filling rate of no-tillage with wheat stubble and no-tillage without wheat stubble were 7.7%, 7.4% more than that of convention tillage, respectively. Results from this study indicated that it is efficiency to enhance grain filling rate of grain filling stage and increases grain weight when we use suitable tillage.