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１ 试验地概况试验地设在江西农业大学校内竹园。属中亚热带北部湿润气候区。年均温１７．７℃，年降水１７０ｍｍ。土中砾石、砖块较多，土壤肥力低，有机质含量１．６７％，速效氮６５．６４ｍｇ／ｋｇ，速效磷６．６５ｍｇ／ｋｇ，均低于临界值，速效钾１１６．７８ｍｇ／?
An experimental test site located in Jiangxi Agricultural University Chuk Yuen. Is a humid subtropical northern climate zone. The average annual temperature of 17.7 ℃, annual precipitation 170mm. Soil gravel, more bricks, soil fertility, organic matter content 1.67%, available nitrogen 65.64mg / kg, available phosphorus 6.65mg / kg, were lower than the critical value, available potassium 116.78mg /?