Nutrients of Topsoil for Sugarcane Planting in Xinping County of Yunnan Province

To provide reference for fertilizer application of sugarcane planting in Xinping County,this paper analyzed nutrient content of topsoil according to the nutrient indicators established in the Second Soil Census. The results show that 51. 76% soil in sugarcane planting area of Xinping County is faintly acid,50. 88% soil has relatively low organic matter,45. 88% soil lacks alkali-hydrolyzable nitrogen( N),26. 47% soil lacks phosphorus( P),50. 29% soil lacks potassium( K),37. 14% soil lacks sulfur( S),12. 86% soil lacks magnesium( Mg),10% soil lacks manganese( Mn),and 31. 43% soil lacks zinc( Zn). In the sugarcane production,it is required to pay attention to increase of application of organic fertilizer,to foster soil fertility,supplement boron fertilizer,to keep balance of soil nutrients.

山西省苹果主产区果园营养现状及施肥建议

通过对山西省苹果主产区果园土壤样品和植株样品的测试、分析、统计,了解了当前该区域内的果园土壤营养和植株营养现状,并参照国内外有关文献,进行了分析评价,同时提出果树不同生育期、不同产量水平的施肥建议。

辽西北风沙地农田土壤养分状况及培肥对策

为了解决辽西北干旱风沙地农田抗旱增收的问题,用化学和农田试验的方法,对辽西北风沙区农田土壤的养分状况和培肥对策进行研究,结果表明:该区农田土壤有机质、碱解氮、速效磷、速效钾平均含量分别为21 g/kg、45.7 mg/kg、4.0 mg/kg、13 mg/kg,含量水平均较低。施肥试验结果表明:增施氮、磷肥对作物产量无明显的增产效果,增施钾肥有明显的增产效果,特别是干旱年份可增产45.6%～63.5%。说明在目前的施肥水平下,氮、磷养分已不是作物产量增加的主要限制因子,而土壤中有效钾质量分数的下降已经上升为主要限制因子。该区农业生产上应加大有机肥的投入,调整氮、磷、钾肥的施用比例。

云南省新平县植蔗土壤耕层养分状况

为新平县甘蔗种植施肥、土壤管理提供依据,通过对植蔗区土壤耕层取样,依据我国第二次土壤普查制定的土壤养分丰缺指标进行养分含量分析。结果表明,新平县植蔗区有51.76%的土壤偏酸,50.88%的土壤有机质偏低,45.88%的土壤碱解氮缺乏,26.47%的土壤缺磷,50.29%的土壤缺钾,37.14%的土壤缺硫,12.86%的土壤缺镁,94.29%的土壤缺硼,10%的土壤缺锰,31.43%的土壤缺锌。甘蔗生产中应注意增施有机肥、钾肥,以培肥地力,补施硼肥,保持土壤养分平衡。