|Table of Contents|

Effects of Sowing Date on Photosynthetic Characteristics of Leaves in Flowering and Bulking Stage and Yield of Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2020年02期
Page:
227-234
Research Field:
Publishing date:

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Title:
Effects of Sowing Date on Photosynthetic Characteristics of Leaves in Flowering and Bulking Stage and Yield of Soybean
Author(s):
GAO Yong-gang1; 2;  GAO Ming3;  YANG Xiao-qiang1; 2;  LIU Dan1; 2;  ZHANG Zhi-guo1; 2;  SUN Shou-jun1; 2
(1.Heilongjiang Provincial Institute of Meteorological Science, Harbin 150030, China; 2.Innovation and Opening Laboratory of Regional Eco-Meteorology in Northeast, China Meteorological Administration, Harbin 150030, China; 3.Heilongjiang Provincial Meteorological Bureau, Harbin 150001, China)
Keywords:
Sowing date;  Soybean;  Flowering and bulking stage;  Photosynthetic characteristics;  Yield;  Effects
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2020.02.0227
Abstract:
In order to study the effects of sowing date on the photosynthetic characteristics and yield of soybean. Based on the 3 sowing treatment experiments of Harbin Agricultural Meteorological Test Station in 2017, the experimental material was the medium ripening soybean Heinong 48, the observation data of photosynthetic parameters, meteorological and yield were analyzed. The results showed that: (1) Photosynthetic characteristics of leaves in soybean flowering and bulking stage were significant different from different sowing dates. Net photosynthetic rate (Pn), transpiration rate (Tr) and water use efficiency (WUE) were increased in suitable sowing date compared with early and late sowing date,Pn, Tr and WUE of suitable sowing date were respectively increased by 14.86% and 15.67%, 1.06% and 1.35%, 14.37% and 14.83% compared with early and late sowing date. The variations of Gs, Ci and SPAD of leaves were different with the delay of sowing date, Gs of suitable sowing date were varied by 17.72% and -20.35% compared with early and late sowing date, and Ci were varied by 9.53% and 3.72%，the Gs trends were declined with sowing dates delayed, the Ci trends were declined before increased with sowing dates delayed, however, SPAD of bulking stage was decreased with the delay of sowing date. (2) The growth status and yield of soybean were affected by the interaction and synergy between photosynthetic parameters. Pn was extremely significant positive correlation with Tr, WUE, PAR, and a extremely significant negative correlation with Ci, there were respectively significant positive and extremely significant positive correlation in air temperature (Ta) and Tr, Gs and Ci, Ta and Gs played an indirect role by affecting evapotranspiration and Ci, respectively. In reproductive growth period of soybean, air temperature, photosynthetic active radiation and soil moisture were the mainly affecting meteorological factors for Pn. (3) There were higher Pn, WUE, dry matter accumulation and seed conversion rate for suitable sowing date, and timely sowing date can make full use of climatic resources such as solar radiation, temperature and water, photosynthetic efficiency was improved, production was increased significantly.

References:

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Last Update: 2020-06-10