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为了研究稻麦轮作中施用厩肥和磷、钾肥的效果,进行了三年田间试验。为了研究施肥对土特性的影响,在试验结束时分析了土壤样品。 材料与方法 田间试验于1972—73、1973—74、1974—75年的上年7月至下年6月在德里进行,土壤为砂粘壤土(砂粒55.3％、粉粒18.5％、粘粒26.2％),PH8.8(土壤与溶液的比率为1:2.5)。土壤中有机C、全N、有效P、有效K含量分别为0.35％、0.041％、5毫克/公斤、197毫克/公斤。水稻子7月的第二周移栽(秧令21天),10月的最后一周收获;小麦于11月的第二周播种,4月的第三周收获。 试验采取裂区设计,四次重复;三年的处理小区均相同。试验处理由12个因子(主区)组成,包括两种厩肥用量(0和15吨/公顷),三种磷肥用量(0、30和60公斤P_2O_5/公顷),两种钾
In order to study the effect of applying manure and phosphorus and potassium fertilizer on rice and wheat rotation, a three-year field experiment was conducted. In order to study the effect of fertilization on soil properties, soil samples were analyzed at the end of the experiment. MATERIALS AND METHODS Field experiments were conducted in Delhi from July 1972 to July next year in 1972-73, 1973-74, and 1974-75. The soil was sandy loam (55.3% sand, 18.5% silt, 26.2% clay %), PH 8.8 (soil to solution ratio 1: 2.5). Soil organic C, total N, available P, available K were 0.35%, 0.041%, 5 mg / kg and 197 mg / kg, respectively. Transplanting of rice in the second week of July (21 days of seedlings) was completed in the last week of October; wheat was planted in the second week of November and harvested in the third week of April. Test to take the split zone design, four repetitions; three years to deal with the same district. The trial treatment consisted of 12 factors (main zone), including two manure levels (0 and 15 tonnes / ha), three phosphate rates (0, 30 and 60 kg P_2O_5 / ha), two potassium