Response Of Yield And Quality Of Sunflower To The Densification Regulation Under The Condition Of Subsoil And Organic Fertilizer

In order to explore the response mechanism of sunflower grain quality and yield to the regulation of densification under the condition of subsoil and organic fertilizer,in 2018,oil sunflower T562 and edible sunflower SH361 were used as test materials.The test set was shallow screw 15cm,subsoil 45cm+organic fertilizer 60000kg/hm2,two kinds of farming measures,three density levels;the density of sunflowers is 30,000 plants/hm2,37,500 plants/hm2,45,000 plants/hm2,and the oil sunflower density is 45,000 plants/hm2,52,500 plants/hm2,and 60,000 plants/hm2.The changes of sunflower grain quality and yield composition under different treatments were determined.The results of this pilot study indicate that:(1)Under different tillage and density treatments,SF-treated Fv/Fm remained stable above 0.75 in the late growth stage of sunflower,which had a certain complementary effect on the stress of sunflower leaf Fv/Fm,and significantly increased the sunflower.The leaf area index and the number of green leaves in the late stage showed that the leaf area index showed the best treatment with SF3000,and the oil sunflower SF4000 was the best.The number of green leaves was the best for SF2000,and the best for oil sunflower SF4000.(2)Under different tillage measures and densities,the injury intensity of the whole growth period of the sunflower was SF2500>SF2000>SF3000,and the intensity of the injury flow during the growth period of the oil sunflower was SF3500>SF4000>SF3000;the SF treatment under the root wound fluid and leaf The area and the number of green leaves were significantly positively correlated,and were significantly positively correlated withsingle-plateweight,seedsettingrate,seed kemel rate,and yield.(3)Under different tillage measures and densities,SF treatment significantly reduced palmitic acid content,and the protein content of sunflower kernels was significantly positively correlated with kernel kernel rate.The protein content of sunflower kernels was SF2000>SF2500>SF3000,oil sunflower kernels.The oil content was significantly positively correlated with the seed setting rate,which was expressed as SF4000>SF3000>SF35000.SF treatment had little effect on the content of oleic acid and linoleic acid in sunflower seeds.(4)The dry matter quality and the dry matter quality of each part of sunflower sunflower and oil sunflower under different density treatments were significantly higher than those of CK under SF treatment.The dry matter accumulation during the ripening period of sunflower was SF2000>SF2500>SF3000.The total dry matter of the oil sunflower was SF3500>SF3000>SF4000,and the yield and HUE increased with the increase of density.