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Evaluation of Drought Characteristics During Soybean Growth Period of 1971-2016 in Heilongjiang Province Based on SPI(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2020年05期
Page:
758-766
Research Field:
Publishing date:

Info

Title:
Evaluation of Drought Characteristics During Soybean Growth Period of 1971-2016 in Heilongjiang Province Based on SPI
Author(s):
ZHU Hai-xia; LI Xiu-fen; YIN Shi-ping; ZHAO Hui-ying; JIANG Li-xia; GONG Li-juan; DU Chun-ying; YAN Ping
(1.Innovation and Opening laboratory of Regional Eco-Meteorology in Northeast China，CMA, Harbin 150030, China； 2.Meteorological Academician Workstation of Heilongjiang Province, Harbin 150030, China； 3.Heilongjiang Province Institute of Meteorological Sciences, Harbin 150030, China)
Keywords:
Drought;  Standardized precipitation index;  Soybean;  Joint appearance
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2020.05.0758
Abstract:
 For studying temporal and spatial features drought during growth period of soybean, based on standard precipitation index (SPI), spatial and temporal variation characteristics is researched for drought of middle or above levels in 76 weather stations of Heilongjiang province with the drought station ratio from 1971 to 2016 during these growing stages of soybean, such as total growing periods, sowing period, seedling period, flowering and podding period and seed filling period. The results showed that, in 46 years, drought was obvious tendency in the western, however, drought degree decreased significantly during sowing and seedling periods of soybean in the last ten years, drought was weak all over in the eastern. Drought area reduced overall during various stages of soybean, and drought area obviously reduced in seedling stage there were almost half of years to drought middle or above levels, and 42 years were dominated by localized drought, regional drought and whole regional drought of grave or above levels. Regional drought and whole drought of grave or above levels occur in these years such as 1975, 1976, 1977, 1979, 1982, 2000, 2001, 2003, 2004 and 2007, furthermore these years were whole drought of extreme level, such as 1977, 1982 and 2003. During various growing periods of soybean, drought has character of joint appearance. In 18 years, two growing periods or above periods to outbreak localized drought or regional drought, above all 1975 and 1999, two growing periods to outbreak regional drought. The continuous occurrence of drought showed in Heilongjiang province from the perspective of time, for example, the continuous occurrence of drought were from 2 to 3 years in these periods such as sowing period, seedling period, flowering and podding period. During various growing periods of soybean, especially seedling period, expensive and serious droughts were apt to occur in 1970s and 2000s, but drought tendency was enhanced during flowering and podding period in the past six years.

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Last Update: 2020-10-21