| Due to extensive management,high input cost and lack of scientific water and fertilizer concentration ratio under traditional irrigation mode,the development of green pepper towards intensive,large-scale and industrialization is seriously affected.Therefore,under the integration of water and fertilizer,whether different water and fertilizer concentration ratios have significant effects on trace elements in green pepper,to find out the optimal water and fertilizer concentration ratio;to study the transmission of the same water and fertilizer concentration ratio.The growth of Zanthoxylum bungeanum under integrated irrigation and water and fertilizer irrigation,which irrigation method is better,and whether the integrated application of water and fertilizer can improve its economic,social and ecological benefits have become the focus of this experimental study.In this study,three-year-old green pepper under integrated irrigation of water and fertilizer was selected as the experimental object in the Kongquexiang Forestry Park of Lezhi County,Sichuan Province.Three sampling points were set up,each point with four treatments(30 plants/treatment)according to different water and fertilizer concentration ratios A: fertilizer 18 Kg,water 300L;B: fertilizer 36 Kg,water 300L;C: fertilizer 54 Kg,water 300L;D: fertilizer 72 Kg,water 300 L.Each treatment was repeated three times to determine trace elements and tree growth in soil,leaves and fruits.Variance analysis was used to study the changes of N,P,K in soil,N,P,K in leaves,chlorophyll A,chlorophyll B,and the average contents of crude protein and crude fat in fruits,and to study their significance.The basic diameter,panicle size,number and coarseness of primary and secondary branches,fruit size and 100-grain weight of Zanthoxylum bungeanum under the traditional irrigation method with the same water and fertilizer concentration ratio and the integrated irrigation method were measured.The data were sorted out and the average value was calculated.The comparison with the growth of Zanthoxylum bungeanum before the experiment was made to study which irrigation method was applied to the growth and growth of Zanthoxylum bungeanum bungeanum.Its quality is better.The direct economic benefits of green pepper under traditional irrigation and integrated irrigation with water and fertilizer were analyzed and compared.According to cost accounting,the expected economic benefits were analyzed and its application benefits were studied.The results showed that:(1)The average contents of N,P and K in soil,N,P and chlorophyll A in leaves,crude protein in fruits,basal diameter of Zanthoxylum bungeanum and 100-grain weight were all the highest under the treatment of D: 72 Kg and 300 L of water and fertilizer.(2)The average content of K element in leaves,chlorophyll B and crude fat in fruits and average diameter of fruits were the highest under water and fertilizer concentration of A: 18 Kg and 300 L.According to the overall performance,D treatment can be used as the optimal water and fertilizer concentration ratio at this stage for the time being.Under the same water and fertilizer concentration ratio,comparing the integrated irrigation method with the traditional irrigation method,it was found that the average basal diameter was about 1.22 cm higher,the average ear size was about 2.19 cm longer,the average ear width was about 0.55 cm,the average number of primary and lateral branches was about 15,the average diameter of primary and secondary branches was about 1.42 cm higher,the average number of secondary main and lateral branches was about 9,and the average thickness of secondary main and lateral branches was about 0.97 cm higher.Cm,the average diameter of fruit is about 0.05 cm,and the average weight of 100 seeds is about 2.07 G.Through the comparative analysis of data,it can be concluded that the integrated irrigation mode of water and fertilizer is the best.Compared with the traditional irrigation method,under the premise of 20 years' operation period,the output value of green pepper integrated with water and fertilizer per mu increased by 536.72 million yuan,the average output value per mu increased by 2662 yuan,the cumulative output value increased by 798.5 million yuan/hm2,the average annual net profit increased by 819.5 million yuan/hm2,the cost input decreased by 21,000 yuan/hm2,and the cost recovery time shortened by three years.In terms of social benefits,it is estimated that 1000 jobs will be provided annually.In terms of ecological benefits,the utilization rate of water resources will be increased by about 20%,fertilizer will be saved by 20%-30%,fertilizer cost will be saved by 200 yuan-300 yuan/mu,pesticide cost by 100 yuan-200 yuan/mu,labor by 300 yuan-400 yuan/mu,and production will be increased by 10%-20%.It can be seen that the integrated irrigation method of water and fertilizer has a very good effect in improving the yield and quality of green pepper,reducing costs and improving profits,and it is also good in improving economic,social and ecological benefits. |
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