砂姜黑土甘薯施肥技术研究

本文研究了砂姜黑土N、P、K肥及不同K肥品种在甘薯上肥效,结果表明:适量的N、P、K均能促进甘薯的生长和产量的提高,过高的N会引起甘薯徒长,进而影响产量.当K肥用量低时,氯化钾增产效果与硫酸钾相近;高用量时,氯化钾对甘薯产量有负作用,硫酸钾增产效果高于氯化钾;氯化钾与硫酸钾配施既可提高甘薯产量,又能节约施肥成本,是K肥有效施肥技术.砂姜黑土上甘薯K肥增产效果最大,其次为P肥,N肥增产效果最小.砂姜黑土适宜施用量分别为58.2kg /hm2 N、129.5kg /hm2 P2O5、190 kg/hm2 K2O.

Study on Fertilization Techniques of Sweet Potato in Shajiang Black Soil Area

Field experiments had been conducted to study the fertilization techniques of sweet potato in Shaijiang black soil,The results indicated that: Right amount N,P,K can promote sweet potato's growth and the output enhancement,excessively high N can cause the sweet potato excessive growth,and then influence output.When K fertilizer rate used low,the effects to increase sweet potato production,the potassium chloride and the potassium sulfate are close;but when K fertilizer high amount used,the potassium chloride has the negative to the sweet potato output,the increase production effect of potassium sulfate is higher than the potassium chloride;The potassium chloride and the potassium sulfate combined can enhance the sweet potato output and decrease fertilizer cost,is K fertilizer effectively applying technology.The effect to increase sweet potato production in Shaijiang black soil,K fertilizer is biggest,next is P fertilizer,the N fertilizer is smallest.The suitable fertilizer applying quantity in Shaijiang black soil are 58.2kg /hm2 N,129.5kg /hm2 P2O5,190 kg/hm2 K2O respectively.