江西省抚州地区水稻土壤养分限制因子的研究

利用土壤养分状况系统研究法对抚州地区中潴乌潮沙泥田水稻土样进行了养分状况综合评价，确定限制作物生长的养分因互及最佳施肥技术。盆栽试验结果表明：高梁作为指示作物时，土壤中主要缺N，P，K，S，Zn,Ca,盆栽中不施用这些元素相对产量只有45％，68％，79％，72％，70％，87％；水稻作为指示作物时，土壤中主要缺N，P，K，S，Zn,盆栽不施用这些元素相对产量只有42％，79％，58％，74％，90％。田间试验结果表明：K肥对水稻的生产有极显的影响，每公顷施59－98kg纯K，比对照增产306－417kg，增产率为4.5％－6.1%,增产显。S肥和Zn肥的试验则表明，在施用先进量N，P，K肥条件下，每公顷施用30kgS肥比不施S肥处理，产量增加153kg，增产率为2.13％；每公顷施用6kg纯Zn比不施Zn肥的处理，产量增加127.5kg，增产率为1.78％；S肥和Zn肥综合施用增产显，增产达372kg/hm^2，增产率达5.19％。

A Study on the Limiting Nutrient Factors in Paddy Soils in Fuzhou District in Jiangxi Province

The systematic approach analysis of soil nutrient status was conducted for evaluating the nutrient factors in the soil from the Fuzhou district, the nutrient limiting factors and the optimal fertilizer technique. Greenhouse result showed: when sorghurn was used as the indicating crop, N, P, K, S, Zn, Ca, were the major limiting factors in the soil and the relative yields were 45%, 68%, 79%, 72%, 70%, 87%, when rice was used as the indicating crop, N, P, K, S, Zn, were the major limiting factors in the soil and the relative yields were 42%, 79%, 58%, 74%, 90%. Field result showed: potassium application could increase the rice yield significantly, applying 59kg to 98kg potassium/hm 2, could increase yield by 316kg to 417kg/hm 2, with yields increasing ranging from 4.5% to 6.1%; The sulphur fertilization and zine fertilization experiment showed: when N, P, K, fertilizer application were the same, the sulphur application of 30kg/hm 2 could increased yield by 153g/hm 2, with yield increase ranging 2.13%; The zine application of 6kg/hm 2 could increased yield by 127.5kg/hm 2, with yield increase ranging 1.78%; if sulphur fertilizer and zine fertilizer were applied together could increase yield by 372kg/hm 2, with yield increase ranging 5.19%.