|
Recent years, Xingguo County of rice acreage , production levels , cropping patterns , multiple cropping , plant rice inputs and outputs changes were analyzed, and compared with the production levels of Jiangxi Province . And rejuvenating soil type , soil fertility levels , irrigation and rice yield and yield components of the analysis , to explore the limit Xingguo County rice yield limiting factor ; through different seeding rate comparative tests , \occurrence major pest analysis , propose a strategy to improve the double cropping of rice production . The main results are as follows seven years between Xingguo County of rice acreage steadily :1,2004 2010 , production increased for six consecutive years , but compared with the average production level in Jiangxi Province 36.83kg/667m2. 2, lower impact Xingguo County high yield rice the main limiting factors : lack of planting density lead to lack of effective ear ; irrational ratios of N , sunbaked not in place , integrated pest management is inadequate . 3 , double cropping of rice yield in Xingguo County Technical countermeasures are: ( 1 ) hybrid early rice seed quantity 1.5/667m2-1.75kg/667m2 ; hybrid late rice 1.25/667m2-1.5kg/667m2 ; ( 2 ) early rice target yield of 450 kg per 667m2 application on the basis of 1000 kg of organic fertilizer applied N 9- 11kg P2053 - 4.5kg , K207 - 9kg ; rice for N 9 -12kg P2052.5 - 3.5kg , K208 - 9.5 kg. ( 3 ) plan of ears 85% the sunbaked than not the sunbaked increase 33.3kg/667m2, an increase of 7.3% . (4 ) double cropping of rice pest control focus in Xingguo County , stepping up the monitoring and prevention and control of planthoppers, leaf roller , rice blast , black-streaked dwarf disease and other major diseases and insect pests , seize the seed treatment , seedling prevention integrated control of three key heading stage .
|