Effects Of Fertilization On Seed Yield Of Forage Grasses And Their Production Constitutes And The Seed Vigor

Based on the facts poor field management lead to low seed yield of of Psathyrostachys juncea, the problem affects application and development. For this reason, the effects of seed production key technology ( nitrogen application,crop residue removing ) on the seed yield,yield components and relative anatomic basis were systematic studied . The theory will create more advanced management and provide theory basis for industrialize for seed production of Russian Wildrye. Based Elymus sibiricus L,Bromus inermis,Festuca arundinacea cv.Hundog 5 materials for the experiment, research on the effects of fertilization on grass seed yield and its components, the effects of seed vigor.The main findings are as follows:1: Based Elymus sibiricus L materials for the experiment, the different levels of nitrogen were fertilized in spring and autumn,the results showed that the nitrogen was significant impact on Elymus sibiricus L seed yield, the highest seed yield was got with the treatment of 350kg/hm2 nitrogen fertilizer (in autumn 233.3kg / hm2ï¹¢in spring 116.7kg/hm2), its seed yield was 1059kg/hm2, there was no distinction among the seed production of disposable fertilizer 150kg/hm2 in spring (the seed yied was 967kg/hm2)and disposable fertilizer 150kg/hm2 in autumn(the seed yield was 1008kg/hm2). Through seed germination experiment: the germination rate and length of seedling were maximum with the treatment of 250kg/hm2 nitrogen fertilizer in spring (83.3kg/hm2)and autumn(166.7kg/hm2) ,the vigour index and germination index of seed were maximum with the treatment of 350kg/hm2 nitrogen fertilizer (autumn 233.3kg/hm2, spring 116.7kg/hm2).2. In Beijing area,studies on the effects of treatment with diferent nitrogen and phosphorus on Bromus inermis seed yield and on the component factors of seed yield were investigated. The experiment results indicated that nitrogen has greater impact for Bromus inermis seed yield and the component factors of seed yield in the same irrigation conditions; when the amount of nitrogen of 150kg/hm2 was applied,Bromus inermis actual seed yield reached the highest yield with 664.5kg/hm2. The primary impact factors of Bromus inermis seed yield is fertile tiller numbers m2, and nitrogen application significantly affected fertile tiller numbers m2,but phosphorus application did not significantly affect to it. when the amount of nitrogen of 150kg/hm2 was applied,fertile tillers reached the most with 664.5 fertile tiller numbers m2.3 In Beijing area,studies on the effects of treatment with diferent nitrogen and phosphorus on Festuca arundinacea cv.Hundog 5seed yield,its component factors of seed yield and vigor of seed were investigated. The experiment results indicated that nitrogen has greater impact for Festuca arundinacea cv.Hundog 5seed yield and the component factors of seed yield, there were no significant differences between the comparison and phosphorus application.Seed yield was maximum at 1061.11 kg/hm2 which N 150 kg/hm2,it was no significant difference with seed yield of 1044.44 kg/hm2 at N 200 kg/hm2.seed germination energy, germination index and vigor index were the highest at N150kg/hm2,there was on significantly affected with phosphorus application.