| This research was from the density, fertilizer management, seeding and picking time, analyzed the influence for sweet corn growth with different farming measure, improved the crucial technology in sweet corn production, made clear how to cultivate Jingketianll2 and Sutian8 in here preliminarily, offered theory basis to enlarging sweet corn production and yielding good returns.The growth of corn at different sowing density with the variety of Jingketianll2 was studied. Show as a result: Under low density the single plant of sweet corn was strong, and had much leaf area; the degree of high density was opposite; There had notable negative correlation between density and the fresh corn ear length and thickness, the number of grain each line, and 100 fresh weight, positive correlation between density and bald length; The corn had big fresh corn ears and good merchandise, but less corn ears produced on unit area at low density, the number of corn ears of unit area production was much comparatively at the degree of high density but single output was low. The suit density of Jinketianll2 was 67500hm"~ in best output and benefit.Sowed seeds by stage with reinforced sweet corn Sutian8 as material, show as a result: The growth of corn sowed before June 30 changed along with postponed seeding time and that sowed after June 30 prolonged gradually; The corn sowed before June 15 were suit to pick 20-24 days after spinning, the suit picking time stretched with the reduction of grouting as the corn sowed after June 15; With the seeding time postponed, the growth of corn individual was measured drop, plant diseases were aggravated, and quality of fresh corn ear changed bad, but in late fall, the output of corn picked up and plant diseases occurred comparatively light; From economic benefit, the earlier fresh corn ear appeared on the market, the more the price high. Corn price that appeared on the market in July at lastten-days period was minimum, after August, the fresh corn ear price began to pick up, after the end of October the corn of late fall appeared on the market on the one hand output picked up, on the other hand, price market was valued, benefit got up substantially.The result of fertilizer management of Sutian8 shows: what use the fertilizer of early stage handled, the plant height, ear height, stem thickness, leaf area etc. were better than early stage apparently, did not apply fertilizer to hand. Fertilized in lump sum on early stage, although expression was sent early for strong sprout, had also formed high-yield group, but later stage had the phenomenon of premature senility; Early stage did not be applied fertilizer, even if in late stage mend the fertilizer of equal quality could not also remedy. Corn ear output and quality would not raised unless the fertilizer applied at prophase (45%-60%), metaphase and anaphase had a certain proportion.Sutian8, the different experiment of depth of seeding showed: Under different climate condition, different depth of seeding was not consistent for the influence of sweet corn growth, sowed shallowly in a certain scope of depth of seeding, much rain made sprout early, but seedling stage was easy to form to pour root. Arid made sprout postpone and emergence rate drop, the ability of resisting lodging also dropped. Sowed deeply in a certain scope opposite. Much rain made emergence rate drop. The suit depth was 4-6cm at the high area of sandy soil, much rain, take low value, take high value arid.The relation between suit picking time and effective accumulated temperature (EAT) showed: picking time after com pollination was controlled by the variation of EAT, EAT at the suit picking time dropped along with picking season postponing. For instance, EAT at suit picking time of spring seeding com was 320-420 , summer 300-400, autumn 280-360. Com of spring seeding picking time should be shortened in advance, the com of autumn seeding picking time should be postponed.
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