Effects of Different Irrigation Amount on Yield,Water Consumption Characteristics and Water Use Efficiency of Rice Under Film Drip Irrigation in Hexi Oasis Irrigation Area
TANG Wenxue
MA Zhongming
LIAN Caiyun
LUO Shuanglong
Abstract：Field experiments were conducted at the Zhangye water-saving agricultural experimental station in the Hexi oasis irrigation area to study the effects of different irrigation amounts(525、750、975、1 200 mm)on the growth,yield,water consumption characteristics,and water use eficiency of rice under film drip irrigation and propose appropriate irrigation schemes,so as to provide technical basis for the eficient use of water in rice under film drip irrigation.The results showed that irrigation amount had a significant impact on rice growth and development,yield,and yield components.When the irrigation amount was 975 mm,the rice yield was 5 521.6 kg/hm2,which was only 2.23％lower than the highest yield(W4 treatment),but significantly increased by 198.37％and 42.98％compared to W,and W2 treatments.Under this irrigation amount,the water use efficiency was the highest,reaching 5.28 kg/(hm2·mm),significantly higher than other treatments.According to water consumption intensity and water sensitivity index,it is determined that the jointing and booting stage,heading and flowering stage are the key periods for water demand in rice.Based on comprehensive analysis,it is proposed that the suitable irrigation amount for the entire growth period of rice is 975 mm,and the irrigation amount at the seedling stage,tillering stage,jointing stage,heading and flowering stage,filling stage,and mature stage of rice is 193、219、236、96、154、77 mm,respectively.This is a suitable irrigation scheme for the Hexi oasis irrigation area to ensure both high yield of rice and efficient water use.
Keywords：Drip irrigation rice under mulchIrrigation amountWater consumption characteristicsYieldWater use efficiency
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1-7 )