超高产条件下郑麦7698产量形成特征特性的研究

Research on the Yield Formation Characteristics of Zheng-wheat 7698 Under the Super-high Yield Condition

为配合优质强筋小麦新品种郑麦7698的推广,采用大田攻关和小区试验相结合,探讨郑麦7698生长发育和产量形成的特征特性。结果表明:在超高产条件下,郑麦7698籽粒灌浆期长,粒重增加快,每日每千粒增重平均达2.1g;郑麦7698叶片上挺,透光性好,上三叶功能期长;在超高产栽培条件下,叶面积系数达7.63,上三叶叶面积系数为5.01,旗叶叶面积系数1.69;小麦籽粒灌浆所需要的干物质主要来自开花后的光合水平产物;郑麦7698产量水平>10500kg/hm2时,其产量结构为穗数648万/hm2,穗粒数37.5粒,千粒重47.2g;产量为9750～10485kg/hm2时,其产量结构为穗数588万/hm2,穗粒数38.1粒,千粒重46.6g。

In line with the promotion of Zhengwheat 7698 with strong gluten, this article analyzed the growth of Zheng - wheat 7698 and the relevant super - high yield cultivation technique according to the researches in the field and experiments in small areas. The results show as follow： under the super - high yield condition, Zheng - wheat 7698 had a long period of grain filling, and the weight of grain in filling stage increased fast, with an average of 2.1 grams of one thousand grains per day; the leaves of Zhegn - wheat 7698 stuck out and had good light transmittance, and the top - three leaves had long functional period; under the super - high yield condition, the index of the leaf area came to 7.63, the index of the top - three leaf was 5.01 and the index of the flag leaf was 1.69 ; the dry matter weight of Zheng - wheat 7698 was mainly from the photosynthate after flowering; Zheng - wheat 7698 〉 10500kg/hm2, the structure of its output was 6480000 spikes/hm2 , 37.5 grains per spike, and one thousand grains＇ weight was 47.2g; 9750 ~ 10485kg/hm2, the structure of its output was 5880000 spikes/hm2, 38.1 grains per spike, and one thousand grains＇ weight was 46.6g.