关键词: 山杏, 山杏, RAPD, 优化

Abstract: Under the conditions of the different sowing date and transplanting density in the WanDao 68 growing period and yield changes, results that the growth period of WanDao 68 is reduced with the delayed sowing time, but deferred to the June 14 seeding still may be normal ripe; transplanting density on the growth period had no significant effect. Different sowing dates of planting in the same period, production is declined with the sowing date postponed, but the reasons for the length of seedling age, spike is increased with the sowing date postponed, each kernel number, seed setting rate and grain weight is decreased; With the increased spike ,Increasing transplanting density can increase the number of output. Under the experimental conditions-WanDao 68 as rice stubble cultivation- the period of the highest yield is transplanting seedlings is the May 5 and 15 day planting, transplanting density of 300,000 / hm2 and 400,000 / hm2, Machine-planting’s appropriate planting date is May 25, direct seeding rice is 4-14 June period for the planting appropriate.