Effect Of Nitrogen And Potassium Fertilization On Barley Nutrient Absorption Yield And Quality

In this paper, field experiment and laboratory analysis were used to study the growth,nutrient absorption and distribution,quality and yield of barley, and the affect of nitrogen and potassium of salinized meadow. The results showed that:1 The dynamic change of barley height in the whole growth period among different treatments were similar, early growth was slow, jointing stage to booting stage, grow faster, later growth was slow, plant height did not change large. In the whole growth period, Aerial parts dry matter accumulation increased gradually, early growth had small increment, after jointing stage increment was faster. Dry matter accumulation in all treatments was significantly higher than the control.2 Compared with the control, barley plant height, ear length, ear weight, grain weight under other treatments are improved, increased among 7.40% 24.76%, 2.00% 47.05%, 36.36% 145.45%, 2.26% 18.64%, and the production increased by 4.84% 15.37%. with the maximum yield by N3K2, and it was 5480kg/hm². and compared with N₁,N₃,N₂K₁,N₃K₁ and N₂K₂ , the difference was significant3 Nitrogen concentrations changes in barley plants greatly at different growth stages was early growth higher than late stage; Phosphorus concentrations from tiller stage to jointing stage, showed an increasing tendency, reached the peak on jointing stage, after jointing P nutrient concentrations decreased gradually, and decreased to the minimum on mature period; K nutrient concentrations showed a gradual downward trend from tiller stage to mature, and from jointing to booting decreased in large amplitude, decreased between 25%⁴3%. Compared with the control, barley plants N, P, K content the of fertilization treatment was significantly higher at various growth stages.4 At boot and mature stage plant nitrogen content had a significant impact on yield, and boot stage had more influence than mature stage(Fb3=20.78**,Fb4=4.33*); At jointing and boot stage plant K-content also had a significant impact on yield, and jointing stage had more influence than boot stage(Fb2=14.22**,Fb3=1.88*).5 Jointing stage, 64%⁷2% of nitrogen concentrated in the leaves; maturity, 73%⁷7% concentrated in the panicle. Jointing and booting stage, 53%⁶7% of phosphorus distribution in the main stem; at maturity, 71%⁷5% of phosphorus distribution in the wheatear. Throughout the whole growth period 46%⁶8% of K concentrated in the stem.6 Soil available nitrogen of all treatments were increase gradually from the tiller stage to jointing stage, decreased from Jointing to booting stage, Maturity increased, but has little increased amplitude; Soil available potassium, were decreased gradually from tiller stage to booting stage, on a rise from booting to maturity, but has little increased amplitude. Soil available K in the treatment of Potassium was significantly higher the no potassium treatment.7 Compared with control, protein content,starch content,bulk density and diastatic power of all treatments increased by 6.6% to 43.19%,1.0% to 5.6%,1.37% to 18.62%,7.67% to 52.9%.