nlwxpearo
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 Posted: Mon 11:38, 31 Jan 2011 Post subject: Nitrogen Nutrition Diagnosis and fertilization _31 |
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Diagnosis and nitrogen fertilization of rice
551500, China) Abstract: TheexperimentalresultsofrecommendationfertilizationofcornindicatedthatanoptimaloptionofapplyingfertilizertocornwasNI2.67 ~ 18.46kg, P2.68 ~ 3.41kg, K6.35 ~ 6.98kgper667mandratioofN: P: Kwas1: 0.21:0,45. Itisessentialtoadjustfertilizationrateaccordingtosoilfertilityleve1. ThehigherfertilitysoilrequiresmorePandlessN, thelowerfertilitysoilneedsmoreNandlessP. Keywords: corn; recommendationfertilization; Qianxicounty Qianxi County is located in the middle of Guizhou Province, the territory of land 48600 hm, where dry land 38400 hm, of the total cultivated area of 79, is a dry farming county. But because the county is relatively backward rural economy, agricultural infrastructure is weak, proportion of low-yielding Land, the ability to withstand natural disasters is low, so low and unstable agricultural production. Dry land in order to improve the county infrastructure and backwardness, Westen 2000 Ministry of Agriculture, Soil and Fertilizer Station of national commitment to the dry farming demonstration projects. Balanced fertilization technology is one of the important construction content. According to the project requirements, the project area will adopt the national unity, balanced fertilization of corn provide a theoretical basis to improve the level of maize production Westen. Materials and methods 1.1 l test experimental design with Treatment level and the amount shown in Table 1. Except the blank for each treatment were outside the quality of manure as base fertilizer applied 1200kg/667m. Experiment was repeated 2 times, random block row [Received Date] 2002-06-09; 2002-10-30 Revised [Author] Bo (1969 a),[link widoczny dla zalogowanych], male, agronomists, soil and fertilizer technology in the promotion. * This project is from 2000 to 2001 annual national dry farming demonstration projects. �� �� ..., �� ... �� �� ... �� �� ...,[link widoczny dla zalogowanych], �� ... �� �� ..., �� �� �� ... �� �� ... �� �� ...,[link widoczny dla zalogowanych], �� ...,[link widoczny dla zalogowanych], �� ... �� �� ... �� �� ..., �� ..., �� - �� �� �� ..., �� ... �� �� ..., �� ... �� �� ... �� ... �� �� ... �� �� ... �� �� ... �� �� ... (2) under 3 years of test results obtained yield and nitrogen fertilizer effects of the equation: Y a 202.42 +49.448 x one 2.0755x, and calculate the optimal nitrogen fertilizer in rice volume 11.9kg/667m. (3) B / A value and the effect of nitrogen fertilizer equation: j, a 1.68 +0.0657 x, B / A measured value can be calculated by the equation of the corresponding nitrogen, and nitrogen fertilizer through a local optimum to determine the amount of topdressing. (4) To facilitate the actual production will be divided into 3 groups of fertilizer: B / A value of �� 2.2, nitrogen fertilizer 3kg/667m; B / A �� 2.0, nitrogen fertilizer 6kg/667m; B / A values �� 1.8, nitrogen fertilizer 9kg/667m, application of the index guide fertilization, achieve better results. [
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