| Corn silage is more crops need fertilizer,fertilizer can guarantee a reasonable increase production,improve quality,the test set different proportion of fertilizer and nitrogen application timing on yield and quality of corn silage respond to different proportion of fertilizer and fertilization period,Preliminary discussion on the fertilizer requirement of silage corn.Based on this,the following two experiments were carried out.First,Dajingjiu 26 was used as the test material to study the effects of different N,P,and K application levels on the growth of silage corn;As experimental materials,the effects of different nitrogen fertilizer ratios on the yield and quality of silage maize were studied.The research results are as follows:1.At the N2P1K2 fertilization level,that is,N,P,and K were 180kg.hm-2,45kg.hm-2,and 75kg.hm-2,respectively,Dajingjiu 26 had the highest biomass yield,30.40t.hm-2,and the single plant dry matter mass was the highest,358.73g.plant,The leaf area index and chlorophyll content are the largest,respectively 8.22 and 73.47.2.Different fertilization levels have different effects on the quality of Dajingjiu 26.When N,P,and K are 180kg.hm-2,45kg.hm-2,and 75kg.hm-2,respectively,the moisture and dry matter compliance rates,net lactation energy,and protein indexes are the best.N,P is not applied or the application amount is too large,resulting in the deterioration of nutritional quality of Dajingjiu 26.3.Nitrogen application rate during the growth period of silage maize varieties is 108kg.hm-2for base fertilizer,36kg.hm-2for jointing period,and36kg.hm-2for big trumpet stage,and the morphological index values such as plant height and stem thickness reach the maximum.Demeiya No.1 had the highest plant height and the thickest stems at the jointing stage and the big trumpet stage when applying 36kg.hm-2of nitrogen,respectively.It was265.70cm and 2.96cm respectively;Dajingjiu 26 had the highest plant height and the thickest stem when applying nitrogen of 36kg.hm-2at the jointing stage and the big trumpet stage,respectively,and it was 354.67cm and3.10cm respectively.Dajingjiu 26 stems have the greatest influence.4.During the growth period of silage maize varieties,the nitrogen application rate was 108kg.hm-2for base fertilizer,36kg.hm-2for jointing period,and 36kg.hm-2for big trumpet period.The leaf area index and chlorophyll content reached the maximum.Demeiya No.1 had the highest leaf area index and chlorophyll content of trifolium trifolium at the flowering stage when nitrogen was applied at 36kg.hm-2at the jointing stage and the big trumpet stage,respectively,and the dry matter accumulation was the highest at 283.3 g.plant;Dajingjiu 26 had a maximum leaf area index of 9.15 at the filling stage and a maximum chlorophyll content of 63.57 at the filling stage and 36kg.hm-2respectively during the jointing stage and the big trumpet mouth stage.The dry matter has the highest quality,346.93g.plant.5.When applying nitrogen 36kg.hm-2at the jointing stage and36kg.hm-2at the big trumpet stage,the grain filling rate showed a linear upward trend and reached a peak at 35 days after flowering.The maximum filling rate was 7.66 g.d、7.17 g.d.6.During the growth period of silage maize varieties,the nitrogen application rate was 108kg.hm-2for base fertilizer application,36kg.hm-2for joint application period,and 36kg.hm-2for nitrogen application period,and the highest biomass yield was 25.62t.hm-2,Dajingjiu 26 has the highest biomass production,at 31.22t.hm-2.7.Under the premise that the total amount of nitrogen application during the entire late growth period is the same,when 36kg.hm-2nitrogen is applied in the big trumpet stage,the CP content,milk yield per ton of dry matter and total digestible nutrient content of silage maize are significantly increased;At36kg.hm-2,increase the FAT content of silage corn.Nitrogen application of36kg.hm-2at the big trumpet stage and 36kg.hm-2at the flowering stage reduced acid and neutral detergent fiber content. |
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