The effects of irrigation amount on grain quality

yield and soil NO-3-N content were studied with strong gluten wheat "Jimai 20" and middle gluten wheat "Taishan 23" by setting four irrigation amount treatments(with 0 mm

180 mm

240 mm

300 mm irrigation amount respectively) under field condition.The results showed that the value of grain glutenin content

ratio of glutenin content to gliadin content

glutenin macropoloymer(GMP) content

wet gluten content and dough stability time were higher under the irrigation treatments of 180 mm and 240mm than that under the irrigation treatments of 0mm and 300 mm for strong gluten wheat "Jimai 20".The value of grain protein content was higher under the irrigation treatment of 0 mm than that under the irrigation treatments of 180 mm

240 mm and 300 mm

while there was no significant difference in the GMP content

wet gluten content and dough stability time among all the irrigation treatments for middle gluten wheat "Taishan 23".The grain yield of the two cultivars were highest under the irrigation treatment of 240 mm

but there was no significant difference between the irrigation treatments of 180 mm and 240 mm for "Taishan 23".The soil NO-3-N content increased with the increase of irrigation amount in deeper layer soil.With grain quality

yield and soil NO-3-N content

the irrigation amount recommended under the condition of this experiment was 180~240 mm and 180 mm for "Jimai 20" and "Taishan 23" respectively.