Effects of "Three Increase and Three Precision" technology on agronomic characteristics and yield of summer-planting peanut
In order to achieve high yield of summer-planting peanut,on the basis of years of research,our team created a high-yield cultivation technology of "Three Increase and Three Precision" for summer-planting pea-nut:Increase accumulated temperature by watering after sowing;Increase the density to expand the group;Increase the application of calcium fertilizer to promote pod filled completely;Precision fertilization by phased nitrogen sup-ply;Precision sowing by planting seed orientation;Precision regulation by "three prevention and three promotion". In order to verify the effects of "Three Increase and Three Precision" technology on the population quality optimiza-tion and yield increasing of summer-planting peanut,eight treatments were set up,including CK (Control),I1 (Wa-tering after sowing),I2 (Increasing density),I3 (Increasing calcium fertilizer application),P1 (Phased nitrogen sup-ply),P2 (Seed orientation planting),P3 (Three control and three promotion) and TT (Three increase and three preci-sion),to study their effects on the agronomic characters and yield composition of summer-planting Peanut. The re-sults showed that compared with other treatments,the emergence stage of "Three Increase and Three Precision" technology system was 3 days earlier than that of the control because it integrated the advantages of "Watering after sowing" and "Seed orientation planting",and the emergence rate was also increased by 5.90％. Besides that,it also inhibited main stem elongation,promoted lateral branch differentiation,and increased the number of branches by 12.90％ compared with the control. The green leaf number of main stem was increased by 16.84％,which was condu-cive to the construction of ideal plant type. Compared with control,it could significantly increase the activity of pro-tective enzymes in mature leaves,the activities of SOD,POD and CAT increased by 17.44％,14.54％ and 34.82％,respectively,while the content of MDA decreased by 15.61％,which effectively alleviate leaf aging. The number of harvested plants increased by 15.35％ compared with control;the number of full pods per plant and the pods weight per plant by 54.07％,47.06％,and 55.35％ respectively compared with control,resulting in a significant increase of 79.06％ in pod yield,and the actual acceptance yield was 619.31kg/667m2,created the record of summer-planting production. In conclusion,the high-yield cultivation technology of "Three Increase and Three Precision" of sum-mer-planting peanut can fully tap the production potential of summer-planting peanut according to the growth char-acteristics of wheat stubble,which is beneficial to achieve high yield.
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