Effect of Plant Growth Inhibitors on Agronomic Traits and Pre-harvest Sprouting Resistance of Quinoa
The fruit of quinoa has no dormancy or a short dormancy period,and the rainy season has not ended in most region of Yunnan when quinoa is ripe.In the early stage of harvest,the pre-harvest sprouting(PHS)is easy to occur under continuous rainy weather or humid environment,which seriously affects the yield and quality of quinoa.In order to select an effective method to control PHS of quinoa,WQ6,which is easy to sprout,was used as the experimental material,and abscisic acid(A1),cycocel(A2)and paclobutrazol(A3)were sprayed at the early flowering stage(B1),full flowering stage(B2)and filling stage(B3),respectively,with spraying clear water as control(CK).The effects of spraying different plant growth inhibitors in different periods on agronomic characters and PHS resistance of quinoa were studied.The results showed that the average membership functions of PHS resistance under inhibitors treatments were less than CK by membership function method,among which the average membership function of spraying cycocel at full flowering stage was the lowest and the PHS resistance was the strongest.All treatments could significantly dwarf plants and affect the yield,among which A2B1,A1B2,A2B2,A3B2 and A1B3 treatments could significantly increase the yield.Considering the yield of quinoa,PHS resistance and inhibitor cost,A3B2 was the best treatment,which spraying 200 mg·L-1 paclobutrazol at full flowering stage had the best effect.
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