Effects Of Density And Transplanting Leaves Age On The Cotton Fertility Characteristics And Yield Of Matrix Plug Seedling Method

Cotton seedling raising and transplanting technology has the advantages of timesaving, saving labor, land, and other characteristics, is conducive to the expansion of cottongrowing area, promote the steady growth of China’s total cotton output. As a kind ofseedling transplanting technology model and many problems in the research and discussion,this paper mainly discusses the influence index of agronomic traits of cotton of differenttransplanting time, on three cotton peach structure, and components of yield; effect ofdifferent planting densities on Agronomic Characters of cotton per unit area, factors ofinfluence on cotton three peach structure and yield, the results are as follows:(1) The cotton boll number per plant and per unit area total boll number2leaf stage,transplanting transplanting3leaf stage,4leaf stage were very significant difference, theoverall transplanting over backwards showed a decreasing trend with the. Differenttransplanting periods on the cotton harvest yield effects are mainly manifested in the2leafstage, transplanting3leaf stage was higher than that of the4leaf stage of transplantingtransplanting; in the same density, the boll number per plant and boll number per unit areayield is higher the more general.(2) From July15th to August15th in autumn peach number3leaf stage at>2leaf stageat>4leaf stage seedlings, from August15th to September15th in autumn peach number2leaf stage at>3leaf stage at>4leaf stage seedlings, the2leaf stage of transplanting Cottonautumn peach number have rapid increase in August15th to September15th between fromJuly15th to August15th, the peach and the number of the number of open bolls, total fruitnumber was significantly higher than that of the4leaf stage and transplanting. Accordingto the value of SPAD, from August15th to September15th2leaf stage of transplantingcotton SPAD value growth rate was significantly higher than that of the4leaf stage ofseedlings,2leaf stage from August15th to September15th with the transplanting ofphotosynthesis intensity increased growth rate, the growth process of cotton to accelerate,peach number and the number of open bolls significantly improve.(3)The2leaf stage and3leaf stage of transplanting transplanting cotton Fu peach,peach autumn number than the4leaf stage of transplanting; the2leaf stage oftransplanting Fu peach number less than3leaf stage of transplanting, but autumn peachnumber higher than3leaf stage of transplanting, harvest yield higher than3leaf stage thattransplanting, growth and development the2leaf stage of transplanting cotton relative tothe3leaf stage is lagging behind; Fu peach trees, peach autumn yield higher number oftransplanted cotton,2leaf stage and3leaf stage of transplanting is conducive to therealization of high yield.(4)The unit area total boll number per plant1600,1800strains,2000strains were significantly higher than other planting density; there is no difference between the bollweight and lint index. The boll number per plant in the condition of low density and highboll number. The total boll number per unit area increased with the increase of plantingdensity of cotton per unit area and the increasing trend of cotton yield increased, mainly byincreasing of the cotton planting density, increase the unit area total boll number.(5)There was a high correlation between seedling raising and transplanting of cottonyield and SPAD value growth. Between September15th and August15th1600plants per667m2,1800strains,2000strains of transplanting density photosynthesis growth faster, hasmore beneficial effects on cotton late growth, growth rate faster peach number and thenumber of open bolls faster growth, the higher the yield.For the yield of unginned cotton and density, unit area total boll number hadsignificant correlation; paid in very significant correlation with the density of lint, unit areatotal boll number, for the yield of unginned cotton. With per667m2to plant1800,2000strains,1600strains of cotton yield higher than other planting density of cotton yield; fromthe density1000plants per667m2to1800plants per667m2yield of cotton is within thescope of overall performance increased gradually with the increase of planting density, unitarea total boll number, the number of autumn peach. But when the density increased tomore than2000lines, production showed a decreasing trend of gradually, the plantingdensity is too high or too low is not conducive to the realization of high yield; plantingdensity of suitable is1800plants per667m2.