Effects of PASP-KT-NAA and Ethylene-Chlormequat-Potassium on the Lodging Resistance,Yield,and Quality of Wheat
To investigate the effects of PASP-KT-NAA and Ethylene-Chlormequat-Potassium on the quality,yield,and lodging resistance of wheat,field experiments were conducted in the experimental garden field of the Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,from 2017 to 2018.Using a split-area experimental design,with four varieties as the main area,and PASP-KT-NAA(PKN)and Ethylene-Chlormequat-Potassium(ECK)as the sub-areas for plant growth regulator spraying frequency and water as the subregional sub-area.Before overwintering,rising phase,and heading period,wheat was sprayed once each(represented by PKN1,ECK1,and CK1),twice each(represented by PKN2,ECK2,and CK2),and three times total(represented as PKN3 and ECK3 and CK3).The findings demonstrated that,in comparison to CK,the ECK2 and ECK3 treatments significantly reduced the basal internodes,increased the stalk diameter and breaking resistance of the last fourth and fifth nodes,and improved lodging resistance of plants.In contrast,the PKN treatment had no significant effect on wheat lodging resistance.Compared to CK,the yield of four wheat varieties treated with PKN increased by 1.00％to 9.87％;yields increased by 5.51％and 9.87％,respectively,with PKN2 and PKN3 treatments.The wheat yields under the PKN1,ECK1,and ECK2 treatments did not differ significantly from that of CK,however the wheat yield under the ECK3 treatment decreased by 6.51％in comparison to CK3.In contrast to CK,PKN treatment raised glutenin to gliadin ratio,decreased the gliadin content,and increased wheat sedimentation value;PKN3 was the best in this regard;ECK2 and ECK3 significantly decreased gliadin content and increased albumin,glutenin content,and the ratio of glutenin to gliadin.Except for the Lunxuan 103,the dough development time of the other three varieties increased significantly compared to CK.In conclusion,ECK2 treatment improved the lodging resistance of wheat,improved the nutritional quality of wheat,and had no significant effects on yield;PKN2 and PKN3 treatments had no significant effects on lodging resistance,but improved yield and grain nutritional quality significantly.
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