[Effects of climate change on potato growth in semi-arid region of Loess Plateau, China].
Based on the 1988-2008 located observation and 2007-2008 encrypted observation of potato growth and the 1957-2008 meteorological observation in semi-arid region of Loess Plateau, this paper studied the effects of climate change on the potato growth in this region. In 1957-2008, the annual precipitation in this region had a descending trend, with a linear fitting rate of the annual precipitation change curves being - 13.359 mm x (10 a)(-1), while the annual mean temperature displayed an ascending trend, with a linear fitting rate of the annual mean temperature change curves being 0.239 degrees C x (10 a)(-1). During potato growth period, the aridity index displayed a marked ascending trend, and the linear fitting rate of the aridity index change curves was 0.102 x (10 a)(-1). The growth rate of potato tuber became faster from the 96th day after sowing, reached the maximum on the 110th day, and turned slower from the 124th day. The interval from sowing to seedling emergence was shortened by 1-2 d x (10 a)(-1), and that from inflorescence formation to reaping and of whole growth period was lengthened by 9-10 d x (10 a) (-1). In the study region, climate warming shortened the vegetative growth stage, but lengthened the reproductive growth stage and whole growth period of potato.
Yao
Yu-Bi
YB
Gansu Province Key Laboratory of Arid Climate Change and Reducing Disaster, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China. yaoyubi@163.com
Wang
Run-Yuan
RY
Deng
Zhen-Yong
ZY
Han
Shu-Lin
SL
Xing
Tuo-Qin
TQ
D000531:Altitude; D002681:China; D057231:Climate Change; D055864:Droughts; D011198:Solanum tuberosum / Q000254:growth & development* / Q000502:physiology*