Study On Growth And Nutritional Quality Characteristics Of Multiple Cropping Rape After Wheat In Ningxia Yellow River Irrigation Area

In order to solve the problem of the waste of large areas of land resources and sunlight and rainfall resources after wheat harvest in the irrigation area of Ningxia,We introduced the "double-low" rapeseed to improve the utilization of land,light,temperature,water and other resources,and improve The economic benefits of farmers.In this experiment,13 rapeseed varieties were repeatedly planted after wheat in a field experiment to study their growth characteristics,plant nitrogen,phosphorus and potassium nutrient content,fresh grass yield during harvest and nutritional quality characteristics,with a view to screening for different uses of rapeseed for multiple cropping after wheat in Ningxia irrigation area.The main findings are as follows:(1)Ganzaoyou No.1 and ornamental variety I have the longest flowering period;during the harvest period,Huayouza 62 has the highest plant height and dry matter accumulation,Fuyou 128 has the largest SPAD value,and Fuyou 158 has the highest stem thickness value.Ganzaoyou No.1 and ornamental variety I are early-maturing varieties.Ganzaoyou No.1 has a flowering period of 73 days,followed by ornamental variety I which has a flowering period of 63 days,The flowering period of Huayouza 62,Jinyouza 158,Jinyouza 6,Huayouza 388 is 53 days,second only to early-maturing varieties Ganzaoyou No.1 and Ornamental Variety I.During the whole growth period,rapeseed plant height,stem thickness,SPAD value,and dry matter accumulation showed a growth state of rapid growth and then slow growth.Plant height,stem thickness,and dry matter accumulation reached the maximum during the harvest period.Huayouza 62 had the highest plant height and dry matter accumulation,which were 162.4 cm and 19.29 g/plant,respectively.Fuyou 128 had the largest SPAD value of 48.4,and Fuyou 158 had the largest stem thickness value of 20.57 mm.(2)The NPK content of different varieties of rapeseed plants is different.During the whole growth period,the nitrogen and phosphorus content of rapeseed is the largest in the seedling stage,and then decreases continuously with the growth period;the potassium content shows an overall trend of increasing first and then decreasing,and the potassium content reaches the maximum in the budding stage and then decreases.During the harvest period,Jinyouza 158,Huayouza 158,Huayouza 62,Fuyou 128,Ningza 19,Fuyou 158 have the highest nitrogen content in the above-ground and the whole plant;Huayouza 68,Ornamental variety I,Lvyou 2,Huayouza 388,Fuyou 128 have the highest above-ground phosphorus content and the whole plant phosphorus content;Huayouza 68,Ningza 19,Fuyou 128,Lvyou 2 have the highest above-ground potassium content and the whole plant potassium content.(3)To study the fresh grass yield and nutritional quality of different rape varieties during the harvest period.Huayouza 62,Jinyouza 128,Huayouza 158,and Jinyouza 158 had the highest yields of fresh grass.The neutral detergent fiber content of Huayouza 62,Jinyouza 158,Huayouza 388,Huayouza 68,Fuyou 158,Lvyou No.2,Jinyouza 128,and Ningza 19 is less than 40%;the acid detergent fiber content of ornamental variety II,Huayouza 68,Fuyou 158,Huayouza 68,Lvyou No.2,Ningza 19,Jinyouza 128 is less than 31%;The crude protein of Huayouza 62,Jinyouza 128,Huayou Za 68 was significantly higher than that of the other varieties;the crude fat content of Ganzaoyou No.1,Huayouza 68 and Ornamental Variety Ⅱ was the highest.(4)According to different indicators,select rape varieties suitable for multiple cropping after wheat in the Yellow River irrigation area in Ningxia for ornamental,green manure and feed.Among the tested rape varieties,Ganzaoyou No.1,Ornamental Variety I,Huayouza 62,Jinyouza No.6,and Jinyouza 158 have the longest flowering period,and their growth characteristics were good and suitable for doing scenic viewing and developing tourismmultiple of cropping after wheat in the irrigation area of Ningxia;Huayouza 158,Jinyouza 158,Jinyouza No.6,and Huayouza 62 have the highest NPK nutrient content and high fresh grass yield.They are suitable for multiple cropping of green manure rapeseed in Ningxia irrigated areas from the Yellow River to improve soil fertility;Huayouza 62,Huayouza 68,Jinyouza No.6 and Huayouza 388 have relatively high yields of fresh grass,and their nutritional quality is also the most suitable for poultry;Huayouza 62,Huayouza 68,Jinyouza No.6 and Huayouza 388 have higher fresh grass yields,and their nutritional quality is also the most suitable for poultry and livestock feed.They are suitable for multiple cropping of rapeseed after wheat in the irrigation area of Ningxia.