| At present,China’s agricultural production is still dominated by the application of chemical fertilizer.The application of organic fertilizer is not enough attention.Improper application of chemical fertilizer will not only damage the soil health,but also worsen the ecological environment.The resource utilization of agricultural solid waste is an important way to promote the application of organic fertilizer.The problem of fertilizer is solved,and the agricultural production is also affected by precipitation.For example,the Huang Huai Region is relatively dry,the Jiang Huai Region has more precipitation,and serious drought and waterlogging will cause crop growth problems.This experiment studied the effect of organic replacement of fertilizer on the growth and nutrient absorption of Huaimai 32 under the drought and waterlogging after anthesis,and analyzed its quality,yield components and dry matter accumulation According to the indexes of accumulation,SPAD value and nutrient absorption content,the proportion of organic fertilizer and chemical fertilizer that are most suitable for wheat growth in three environments was determined,which laid a theoretical foundation for high yield and high quality wheat.In this experiment,the pot test method was used,and six fertilizer treatments were set:No.1 treatment(CK)blank without fertilization,No.2 treatment(UF)100%chemical fertilizer,No.3 treatment(OF30)organic fertilizer 30%+70%fertilizer,No.4 treatment(OFZ30)organic fertilizer 30%+70%chemical fertilizer,and later nitrogen fertilizer 3.3g/pot,No.5 treatment(OF50)organic fertilizer 50%+50%chemical fertilizer,No.6 treatment(OFZ50)organic fertilizer 50%+50%chemical fertilizer,and 3g/pot nitrogen fertilizer at the later stage.Water stress is carried out after the flowering period of wheat.Mainly studied six physiological indicators such as wheat dry matter accumulation and quality,observed the differences between the treatments,and screened out the most suitable fertilization ratio for wheat.Research indicates:(1)Under waterlogging stress,the powder yield was higher in No.4 treatment,with a value of 64.8%,which was 1%higher than that in No.2 single application of chemical fertilizer treatment.The wet gluten content was the highest in No.4 treatment,with a value of 29.2%,which was 0.6%higher than No.2 treatment.The No.4 treatment with starch content was 6.61%higher than the No.2 treatment with single fertilizer application.From the point of view of dry matter accumulation,the dry matter accumulation of treatment 4 was relatively high during the harvest period,which was 5.01g/plant higher than that without chemical fertilizer treatment(treatment No.1).Judging from the components of yield,the 1000-grain weight is relatively high with No.4 treatment,with a value of 46g.Judging from the SPAD value,compared with the rest of the processing,the SPAD value is the highest 52.2.From the point of view of nutrient absorption,the N,P,and K content of wheat shoots was relatively higher with No.4 treatment,and the N,P,and K accumulation of wheat aerial plants was relatively higher with No.4 and No.6 treatments.(2)Under drought stress,the wet gluten values of wheat treated with No.4 to No.6 are all above 30%.The No.4 treatment was relatively high in the values of protein and powder extraction rate.From the point of dry matter accumulation,the dry matter accumulation of treatment No.4 and treatment No.6 was higher,with values of 8.52 g/plant and 7.1 g/plant.Compared with no chemical fertilizer treatment(No.1 treatment),it increased by 5.1g/plant and 3.68g/plant.From the perspective of yield components,treatments No.4 and No.6 had relatively higher values among the yield components,and were significantly different from those without fertilization.From the point of view of SPAD value,when the harvest period between treatments was low at the same time,treatment No.4 and treatment No.6 were relatively high,with values of 45.2 and 43.5.From the point of view of nutrient absorption,the nitrogen,phosphorus and potassium content of wheat aerial plants is relatively high,and the accumulation of nitrogen,phosphorus,and potassium in wheat aerial plants is also higher with the treatment value of No.4.(3)Under normal irrigation and growth conditions,the powder extraction rate of No.4 treatment was 3.2%higher than No.2 treatment.The wet gluten content is up to 30.56%in No.4 treatment.From the point of dry matter accumulation,No.4 treatment had the highest dry matter quality of 9.63g/plant,which was 4.04g/plant higher than that without chemical fertilizer treatment(No.1 treatment)and 1.06 higher than pure fertilizer application(No.2 treatment).g/plant.From the perspective of yield components,the 1000-grain weight of No.4 treatment was 48.9 g,and the number of spikes per ear was 50.8 grains/ear,which was higher compared with other treatments.Judging from the SPAD value,the SPAD value was relatively low during the harvest period,and nutrients accumulated in the grain,but the SPAD value at the harvest period of No.4 treatment was 48.From the point of view of nutrient absorption,the nitrogen content of wheat aerial plants was relatively high with No.4 and No.3 treatments,respectively,0.21%and 0.19%,and the phosphorus content of wheat aerial plants was relatively high with No.4,with a value of 0.185%,The potassium content of wheat aerial plants was relatively high with No.4 treatment,which was 0.55%.The accumulation of N,P and K in the aboveground wheat plants was relatively high under No.4 treatment,which was 0.0921g/plant,0.0233g/plant and 0.0799g/plant,respectively.Although the No.4 treatment had higher nutrient content in various indicators of wheat,it was not significantly different from the No.3 treatment.Both the No.3 treatment and the No.4 treatment are organic fertilizer 30%+70%chemical fertilizer,but the No.4 treatment adds a late top dressing.In order to save labor costs and reduce costs and increase efficiency,No.3 No Topdressing treatment is more suitable for promotion. |
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