耒阳市“烟—稻”模式晚稻最佳施钾量研究
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摘要
为了研究耒阳市"烟—稻"种植模式下晚稻的最佳施钾量,以T优272为供试晚稻品种,进行钾单因素4水平6处理的田间肥效试验。结果表明:施纯钾2 kg/667m~2,晚稻产量最高,净收益最大,分别比对照增产20.0～53.3 kg/667m~2,增收52.00～138.66元/667m~2。回归分析结果表明:"烟-稻"栽培模式下,晚稻产量与钾肥用量之间相关程度不高,这可能与供试土壤钾养分含量较高有关。根据钾肥效应一元二次回归模型得出:在试验条件下施纯钾1.78 kg/667m~2,对应最佳经济产量为484.4kg/667m~2。
In order to study the optimal potassium content of late rice under the Leiyang "tobacco-rice" planting pattern, the field effect test of potassium single factor at 4 levels with 6 treatments was conducted on the late rice variety T-272. The results showed that pure potassium of 30 kg/hm~2 obtained the highest yield and maximum net profit, respectively 300.0-799.5 kg/hm~2 and 780.0-2 079.9 Yuan/hm~2 more than the check. The regression analysis showed that the correlation between the yield of late rice and the amount of potassium fertilizer was not significant under the "tobacco-rice" cultivation model, which might be the result from a high potassium content in the raw soil. According to the quadratic regression model of potash effect, the pure potassium 26.7 kg/hm~2 under the test condition would theoretically reach the best profitable yield 7 266.0 kg/hm~2.
In order to study the optimal potassium content of late rice under the Leiyang "tobacco-rice" planting pattern, the field effect test of potassium single factor at 4 levels with 6 treatments was conducted on the late rice variety T-272. The results showed that pure potassium of 30 kg/hm~2 obtained the highest yield and maximum net profit, respectively 300.0-799.5 kg/hm~2 and 780.0-2 079.9 Yuan/hm~2 more than the check. The regression analysis showed that the correlation between the yield of late rice and the amount of potassium fertilizer was not significant under the "tobacco-rice" cultivation model, which might be the result from a high potassium content in the raw soil. According to the quadratic regression model of potash effect, the pure potassium 26.7 kg/hm~2 under the test condition would theoretically reach the best profitable yield 7 266.0 kg/hm~2.
引文
[1]刘青桂,陈小虎,李华,等.衡阳市烟田土壤养分丰缺指标研究及应用[J].湖南农业科学,2015,(7):44-47.
[2]谢卫国,黄铁平,钟武云,等.测土配方施肥理论与实践[M].长沙:湖南科技出版社,2006.
[3]刘青桂,邓丽君,吴建玲,等.耒阳市“烟-稻”种植模式晚稻最佳施氮量研究[J].湖南农业科学,2016,(8):22-24.
[4]贺才明,刘青桂,刘思乡,等.超级杂交稻Y两优1号平衡施肥技术研究初报[J].杂交水稻,2007,22(2):48-50.
[5]谷云松,梁钰彬,雷春燕,等.氮肥不同用量对杂交晚稻T优272产量及其构成因素的影响[J].农业科技通讯,2013,(9):17-18.
[6]谷云松,曾小平,梁钰彬,等.不同施氮量对耒阳市烟—稻轮作晚稻的影响研究[J].湖南农业科学,2013,(3):41-43.
[2]谢卫国,黄铁平,钟武云,等.测土配方施肥理论与实践[M].长沙:湖南科技出版社,2006.
[3]刘青桂,邓丽君,吴建玲,等.耒阳市“烟-稻”种植模式晚稻最佳施氮量研究[J].湖南农业科学,2016,(8):22-24.
[4]贺才明,刘青桂,刘思乡,等.超级杂交稻Y两优1号平衡施肥技术研究初报[J].杂交水稻,2007,22(2):48-50.
[5]谷云松,梁钰彬,雷春燕,等.氮肥不同用量对杂交晚稻T优272产量及其构成因素的影响[J].农业科技通讯,2013,(9):17-18.
[6]谷云松,曾小平,梁钰彬,等.不同施氮量对耒阳市烟—稻轮作晚稻的影响研究[J].湖南农业科学,2013,(3):41-43.