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《Journal of Fujian Agricultural University》 1996-01
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Magnesium Requirement and Magnesium Fertilizer Application of Rice

Li Yan~1 Qin Suichu~2 (~1Department of Land and Environment Science, FAU, Fuzhou 350002; ~2Department of Land Science and Applied Chemistry, ZAU, Hangzhou 310029)  
The main results obtained from field and hydroponics experiments were as follows: (1) The order of Mg level in rice plant organs were: leafstemearroot. The proper organ for Mg deficiency diagnosis was leaf. (2) Mg accumulated chiefly in leaf and stem before ear emergence period and after that the developing ear became the most importment sink for Mg. At ripening stage, more than a half of Mg absorbed by rice accumulated in leaf and stem, so turn over rice straw into soil was an effective treatment for avoiding rice Mg deficiency. (3) Two peaks of Mg absorption were at tilling stage and at ear developing stage. (4) Mg deficiency at tilling stage and at seedling stage both reducing rice grain yield significantly, Mg fertilizer should be applied as basal fertilizer in production. (5) For Mg deficient soils, the proper doses of Mg fertilizer was 15kg Mg per hectare and the suitable Mg fertilizers were calcium magnesium phosphate and magnesium sulfate.
【Fund】: 浙江省自然科学基金资助项目
【CateGory Index】: S511
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