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秸秆还田及绿肥轮作历来是我国培肥农业土壤的重要措施,明确秸秆及绿肥施入土壤后释放和残留的关系是合理安排绿肥轮作比例及有计划地实行秸秆还田、定向培肥土壤和保持高产稳定的重要依据.一、试验条件与方法1.试验材料的制备 砂培盆栽夏玉米及田菁各九盆,每盆用砂3600克,用格利里格尔营养液[每升含(~(15)NH_4)_2SO_4 0.394克、KH_2PO_4 0.136克、KCl0.075克、MgSO_40.064克、FeCl_30.025克]加微量元素液(每升含硼酸0.5毫克、硫酸锰0.25毫克、硫酸铜0.1毫克、硫酸锌0.1毫克)培养.同时用普通硫铵代替营养液中(~(15)NH_4)_2SO_4做平行试验.培养期
Straw returning and green manure rotation have always been an important measure to fertilize agricultural soil in our country. It is clear that the relationship between straw and green manure released after release into the soil and residue is the rational arrangement of green manure rotations and the systematic implementation of straw returning, directional fertilization of soil and An important basis to maintain high yield and stability First, the test conditions and methods 1. Preparation of test materials sand culture potted summer maize and Tian Jing nine pots, 3600 grams of sand per pot, with Geli Ligel nutrient solution [per liter (~ (15) NH_4) _2SO_4 0.394g, KH_2PO_4 0.136g, KCl0.075g, MgSO_40.064g, FeCl_30.025g] plus trace elements solution (0.5mg boric acid per liter, 0.25mg manganese sulfate, copper sulfate 0.1 Mg, zinc sulfate 0.1 mg) were cultured in the same time with ordinary ammonium sulfate instead of nutrient solution (~ (15) NH 4) _2SO_4 parallel experiments.