The Effects Of Basic Seedling Number And Nitrogen Management On Growth-development And Nutrient Absorption Of Pot-Seedling Mechanical Transplanting Rice

Test in County Zeng Jia Cun in Jiangxi Province in 2015, Early and late rice variety were Zhuliangyou 189 and shengtaiyou 722. The basic seedling number test was divided into four treatments,That is 2 grains, 3 grains, 4 grains and 5 grains per bowl.the number of basic seeding was 504 thousand/hm2,756 thousand/hm2;1000.8thousand/hm2;1260thousand/hm2. N fertilizer experiment design with six treatments, with no nitrogen was used as control group, the other four treatments based: tiller: panicle fertilizer ratio of 5: 1:4,5: 2: 3,5 : 3: 2,5: 4: 1,5: 5: 0 respectively.Early rice nitrogen of 165 kg/hm2, late rice of195 kg/hm2. Amount of potash fertilizer for K2 O 150 kg / hm2, among of the tillering fertilizer 100 kg / hm2, panicle fertilizer 50 kg / hm2; meanwhile all the phosphate fertilizer as basal fertilizer, dosage of 90 kg/hm2.The results show that:1.Pot seedling machine conditions, the remarkable effect on early and late rice growth and development and nutrient uptake in different basic seedling. The highest yield is 3seedlings per bow at early and late rice.The lowest yield is 5 seedlings per bow at early and late rice.3 seedlings per bow,the dry matter production and total dry matter accumulation,leaf sheaths transport rate, N?P?K accumulation amount were the highest after heading.Dry matter accumulation was positively correlated with the yield of early rice, and late rice dry matter accumulation were extremely significantly related on yield.early and late rice mature nitrogen, phosphorus and potassium accumulation were significantly related on yield.2. Pot seedling machine conditions, the remarkable effect on cropping yield,community development, nutrition characteristics and nutrient use efficiency in nitrogen management..The early and late rice yield, dry matter accumulation and nitrogen,phosphorus and potassium accumulation after heading, as well as the utilization rate of nitrogen absorption, agriculture utilization and physiological utilization were highest in N2treatment(nitrogen ratio 5:2:3). Correlation analysis showed that per panicle of grain number and effective panicle were significantly related on yield at early and late rice Dry matter accumulation were extremely significantly related on yield at early and late rice,nitrogen, phosphorus and potassium accumulation were significantly related on yield.