摘要
根据民勤县灌区４年春小麦灌溉对比试验，对春小麦适度水分亏缺下节水增产机理作了初步分析。结果表明：在春小麦分蘖、拔节、乳熟前期受旱３ｄ～５ｄ，可增产２％～２０％，耗水量减少７５０ｍ３／ｈｍ２～１０５０ｍ３／ｈｍ２。适度亏缺灌溉能够促进根系发育，提高抗旱能力，提高抗倒伏能力，并对生殖生长有促进作用，使６６７ｍ２穗粒数增加。将有限水量用于保证关键时期的水分供应，具有明显节水增产作用。
The mechanism of water saving effect in deficit irrigation is analyzed after 4 years of contrast experiment in Minqin County. The results show that, when spring wheat suffers from drought for 3～5 days during tiller, jointing and ripening stages, the yield increase by 2%～20% and the water comsumption decreases by 750～1050hm2. So this method could promote root system growth, antidrought resistance, reproduction development and water saving efficiency.
出处
《干旱地区农业研究》
CSCD
北大核心
1998年第2期80-83,共4页
Agricultural Research in the Arid Areas
基金
甘肃省水利重点科研项目
关键词
春小麦
亏缺灌溉
节水效应
增产效应
spring wheat, deficit irrigation, water saving effect
