Influence of drought and flood alternation stress in different growth stages on rice yield and components
CAO Ruizhe1*, GAO Shikai2
1. Shanghai Water Engineering Design and Research Institute Co. Ltd., Shanghai 200061, China; 2. School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China
Using water level in rice fields as a regulation index of drought and flood alternation stress, the changes of rice growth, yield and components in different growth stages under drought and flood stress were studied experimentally in the paper. Field experiments were conducted by employing evapotranspiration absorption(ETA)bed in tillering, jointing and booting, heading and flowering as well as milky stages. The drought and flood alternation stresses occurred in four major growth periods could affect rice yield, especially the stress in jointing and booting stages, which could reduce the yield by 14.67% and 20.16% in maximum, respectively. The stresses in tillering stage could decrease number of rice panicles by 5.76% to 8.94%. The stresses in jointing and booting stages as well as heading and flowering stages could decrease number of grains per panicle by 6.07% to 9.57%. The stresses in hea-ding and flowering stages as well as milky stages could decline seed setting rate, especially, that in heading and flowering stages, which resulted in reductions of seed setting rate by 5.89% and 7.24% in maximum. The stress in milky stage could lower thousand grain weight by 3.81% and 5.70%. The successive drought and flood alternation stresses in multiple growth stages can produce a superposition effect and affect rice yield severely. This situation should be avoided as much as possible in ordinary rice planting.
CAO Rui-Zhe-*,GAO Shi-Kai-. Influence of drought and flood alternation stress in different growth stages on rice yield and components[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(7): 639-644.
CLOTHIER B E, VOGELER I, MAGESAN G N. The breakdown of water repellency and solute transport through a hydrophobic soil[J]. Journal of hydrology, 2000,231/232:255-264.
LIU Chuncheng, LI Yi, REN Xin, et al. Applicability of four infiltration models to infiltration characteristics of water repellent soils[J]. Transactions of the CSAE, 2011,27(5):62-67.(in Chinese)
YUAN Jing, JIANG Xinhui, HUANG Jinzhu, et al. Effects of fast conversion from drought to waterlogging stress on physiological characteristics of rice in jointing-booting stage[J]. Water conservancy science and technology and economy, 2008,14(4):259-262.(in Chinese).
WALLACH R. Effect of soil water repellency on moi-sture distribution from a subsurface point source[J]. Water resources research, 2010,46(8):863-863.
LI Ke, JING Yuanshu, TAN Mengxiang, et al. Effects of different irrigation rates on physiological characteri-stics and water use efficiency of rice at jointing and booting stage[J]. Jiangsu agricultural sciences, 2017,45(13):60-63.(in Chinese)
AHMED, M E, VAN GEEL P J, et al. Potential concerns related to using octadecyltrichlorosilane(OTS)in rendering soils and porous ceramics hydrophobic[J]. Journal of contaminant hydrology, 2009,110(1/2):22-33.
XIA Shitou, PENG Keqin, ZENG Ke. Relationship between physiological damage of flood to rice and rice production[J]. Plant physiology communications, 2000,36(6):581-588.(in Chinese).