{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T14:28:29Z","timestamp":1740148109082,"version":"3.37.3"},"reference-count":40,"publisher":"Wiley","license":[{"start":{"date-parts":[[2022,4,28]],"date-time":"2022-04-28T00:00:00Z","timestamp":1651104000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100020200","name":"Heilongjiang Academy of Agricultural Sciences","doi-asserted-by":"publisher","award":["HNK2019CX20-02"],"award-info":[{"award-number":["HNK2019CX20-02"]}],"id":[{"id":"10.13039\/501100020200","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Computational Intelligence and Neuroscience"],"published-print":{"date-parts":[[2022,4,28]]},"abstract":"<jats:p>Heilongjiang Province is the main grain producing region in China and an important part of Northeast China Plain, which is one of the three black soil belts in the world. The cultivated region of black soil accounts for 50.6% of the black soil region in Northeast China. Due to the obvious rise of temperature and uneven distribution of precipitation in the 20th century, it has been considered to be one of the important reasons for agricultural drought and aridity. Under the background of climate change, understanding the multiyear changes and occurrence characteristics of cultivated land drought in different agricultural regions in Heilongjiang Province is of great significance for the establishment of agricultural drought prediction and early warning system in the future, guiding agricultural high-standard farmland irrigation in different regions, promoting black soil protection, and then improving grain yield. This paper calculates the temperature vegetation drought index (TVDI) based on the normalized difference vegetation index (NDVI) and surface temperature (TS) product data of MODIS from 2000 to 2021. Taking TVDI as the drought evaluation index, this paper studies the temporal and spatial variation distribution characteristics and occurrence frequency of drought in the whole region and four agricultural regions of Heilongjiang Province: Daxing an Mountain and Xiaoxing an Mountain (region I), Sanjiang Plain (region II), Zhangguangcai Mountains (region III), and Songnen Plain (region IV). The results show that medium drought generally occurred in Heilongjiang Province from 2000 to 2021, accounting for about 70% of the total cultivated land. The drought was severe from 2000 to 2009 and weakened from 2010 to 2021. In the 110\u2009months of the crop growing season from 2000 to 2021, about 63.84% of the region suffered more than 60 droughts. It is found that the frequency of drought varies from region to region. More than 80 droughts occurred in the west of region IV and the middle of region II. The characteristics of region IV are large sandstorm, less precipitation, and lack of water conservancy facilities, resulting in frequent and strong drought. It is also found that the occurrence frequency, degree grade and regional distribution of drought are closely related to seasonal changes. In spring, the occurrence grade and frequency of drought in region IV are the strongest and the drought phenomenon is serious. In autumn, drought is frequent and distributed in all regions, but the grade is not strong (mainly medium drought), and the drought phenomenon is medium. It is humid in summer. Crops in Heilongjiang Province are one crop per annual. Spring drought seriously restricts the water content of crops. Long-term drought will lead to poor crop development and reduce yield. Therefore, only by clarifying the characteristics of regional time drought, monitoring accurate drought events and accurately predicting the occurrence of drought, can we guide high-standard farmland precision irrigation, improve crop yield and ensure national food security. At the same time, severe drought will affect the terrestrial ecosystem, resulting in the distribution of crops and microorganisms, and the transformation between carbon sink and carbon source.<\/jats:p>","DOI":"10.1155\/2022\/1003243","type":"journal-article","created":{"date-parts":[[2022,4,29]],"date-time":"2022-04-29T06:05:51Z","timestamp":1651212351000},"page":"1-13","source":"Crossref","is-referenced-by-count":2,"title":["Analysis of 22-year Drought Characteristics in Heilongjiang Province Based on Temperature Vegetation Drought Index"],"prefix":"10.1155","volume":"2022","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9048-3306","authenticated-orcid":true,"given":"Li","family":"Wu","sequence":"first","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Youzhi","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Limin","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Regional Chinese Academy of Agricultural Sciences, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenhuan","family":"Xie","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lijuan","family":"Song","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haifeng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongwen","family":"Bi","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanyan","family":"Zheng","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofei","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yan","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhiqun","family":"Lv","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Remote Sensing and Information, Heilongjiang Academy of Agricultural Sciences, Haerbin 150086, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"issue":"6","key":"1","first-page":"1024","article-title":"Preliminary analysis on the characteristics and causes of temperature anomalies in Northeast and eastern North China","volume":"24","author":"H. 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