不同播期春小麦的干物质积累特性研究

论文总字数：20609字

目 录

摘要： 1

Abstract 2

1.引言 3

1.1气象条件对小麦产量形成的影响 3

1.2播期对小麦产量形成的影响 4

2.材料与方法 5

2.1 实验设计 5

2.2 测定项目与方法 5

3.结果与分析 7

3.1 不同播期对春小麦生育期长短的影响 7

3.2不同播期对春小麦LAI动态的影响 8

3.3不同播期对春小麦叶片干重动态的影响 9

3.4不同播期对春小麦茎秆干重动态的影响 10

3.5不同播期对春小麦穗重动态的影响 11

3.6不同播期对春小麦群体干物质量动态的影响 11

3.7不同播期对春小麦干物质分配动态的影响 12

3.8不同播期对春小麦产量的影响 14

3.9气象因子对产量的影响 14

4.结论 16

参考文献 17

致谢 20

不同播期春小麦的干物质积累特性研究

陈佳鑫

（，China）

Abstract：The sowing time of wheat significantly affected dry matter accumulation and final yield of spring wheat. In order to study the dry matter accumulation characteristics of spring wheat with different sowing dates, Jilin 24 was used as material, and three sowing dates were conducted for two consecutive years. At various stages of wheat development, the leaf area index, the dry matter quality of various vegetative organs and the yield of the final maturity period were measured, so as to analyze the dynamic changes of dry matter accumulation and the change of dry matter transport in different sowing periods. The results showed that the highest yield of S5 was 446.34g/m². The dry matter growth rate was the fastest, the dry matter accumulation of the mature period population was the largest, 1819.57g/m², the dry matter transport rate decreased, but the grain contribution rate after the flower increased, which was 2.86% higher than the average annual value. During the growth period of S5, the daily average temperature was 16.7 degrees, the net radiation was 12.09MJ/m2 D, and the daily average precipitation was 2.9mm. The yield of S3 was the lowest, only 183.49 g/m2, and the dry matter accumulation in mature stage was only 1629.55 g/m2, and the grain accumulation after anthesis was the lowest. Appropriately postponing sowing time, increasing accumulated temperature, and promoting dry matter accumulation of wheat. The yield of spring wheat was negatively correlated with the average temperature of the emergence - jointing stage, the rainfall of flowering - mature period and the average temperature, but was positively related to the diurnal range of the jointing - flowering period and the net radiation of the flowering - maturity stage.

Keywords：spring wheat; sowing date; dry matter accumulation

1.引言

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