Effects Of Nanochitin On Nutritent Uptake,Distribution And Yield Of Winter Wheat

Outdoors pot experiments and field plot experiments were conducted to study the effect of nanochitin application rate on nitrogen,phosphorus and potassium accumulation and distribution,grain yield and quality,soil available nitrogen,phosphorus and potassium content at critical growth stages of winter wheat,differentiation spikelet numbers of winter wheat,grain numbers in different parts at the end of booting stage of winter wheat spike.This study aims to provide a practical basis for the application of nanochitin in wheat production.Among them,four levels of nanochitin concentration were conducted in the pot experiment: CK(0 mg·kg-1),T1(2 mg·kg-1),T2(6 mg·kg-1)and T3(20 mg·kg-1).Field plot experiment was conducted with 5 treatments: CK,T1(1.35 kg·hm-2 nanochitin),T1'(1.35 kg·hm-2 chitin),T2(0.45 kg·hm-2 nanochitin)and T2'(0.45 kg·hm-2 chitin).1.Under our experimental conditions,in outdoors pot experiments,the effect of6 mg·kg-1 treatment was the best;in field plot experiments,the effect of 1.35 kg·hm-2treatment was the best,and the effect of nanochitin was better than the effect of chitin.2.In outdoors pot experiments,the best treatment could improve the nitrogen and potassium accumulation at maturity stage of two tested winter wheat,at this level,the nitrogen and potassium accumulation were significantly increased by 7.1%,8.3%for Zhoumai 22;27.3%,22.2% for Lancai 168 compared with control.In field plot experiments,the best treatment could improve the nitrogen,phosphorus and potassium accumulation at maturity stage of winter wheat,at this level,the above indicators which was increased by 31.4%,26.0% and 15.8% respectively compared with control.3.In outdoors pot experiments,the best treatment could significantly improve the nitrogen harvest index at maturity stage of Zhoumai 22,also could improve the nitrogen and phosphorus utilization efficiency and harvest index,potassium harvest index of Lancai 168 compared with control.In field plot experiments,the best treatment could significantly improve the nitrogen utilization efficiency compared with control.4.In field plot experiments,the best treatment could significantly improve thesoil inorganic nitrogen and available potassium content at wintering,booting and maturity stages of winter wheat which were significantly increased by 15.4% ~ 34.0%,23.4% ~ 30.1% respectively compared with control;it also could improve the soil available phosphorus content at the booting and maturity stages of winter wheat which was increased by 34.5% ~ 36.3% compared with control.5.The best treatment of outdoors pot experiments and field plot experiments could improve the Pn,Gs,Ci and Tr in flag leaves at booting stage of winter wheat.In outdoors pot experiments,the best treatment could significantly improve the above indexes increased by 33.8%,38.1%,7.2%,50.0% for Zhoumai 22,31.0%,87.5%,20.3%,29.8% for Lancai 168 respectively compared with control.In field plot experiments,the best treatment could significantly improve the above indexes increased by 19.3%,81.4%,14.5%,13.6% respectively compared with control.6.In outdoors pot experiments,compared with control,the best treatment could significantly improve the grain yield increased by 23.0% through improve the spike and grains per spike numbers of multiple spike type winter wheat Zhoumai 22,significantly improve the grain yield by 31.2% through improve the grains per spike numbers of large spike type winter wheat Lanai 168.In field plot experiments,the best treatment could significantly improve the theoretical yield and actual yield increased by 16.8%,16.4% respectively compared with control through improve the grains per spike numbers and 1000 grains weight of winter wheat.7.The best treatment of outdoors pot experiments and field plot experiments could improve the grain iron,zinc and crude protein accumulation and content of winter wheat.Compared with control,in outdoors pot experiments,the best treatment could significantly improve the above indexes increased by 11.6%,22.3%,5.0%;37.1%,49.5%,29.8% for Zhoumai 22,31.9%,26.8%,33.4%;75.8%,68.2%,78.9%for Lancai 168 respectively.In field plot experiments,the best treatment could significantly improve the above indexes increased by 27.9%,35.2%,23.4%;50.3%,60.5%,43.9% respectively compared with control.8.The best treatment of field plot experiment could improve the hormone content of young spike in the young spike differentiation process of winter wheat,differentiation spikelet numbers of winter wheat spike of winter wheat.And found that there have a relationship of significantly positive correlation between the differentiation spikelet numbers and the IAA content of young spike of winter wheat;spikelet numbers of winter wheat and grain numbers per spike showed extremelysignificant positive correlation.