砂姜黑土甘薯施肥技术研究

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

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/hm2N、129.5kg/hm2P2O5、190 kg/hm2K2O。

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 potatos 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/hm^2 N, 129. 5kg/hm^2 P2O5 , 190 kg/hm^2 K2O respectively,