淮北平原小麦钾肥高效施用技术研究

通过田间定位试验 ,研究了淮北平原砂姜黑土地区小麦—玉米轮作制下小麦钾肥施用技术。结果表明 ,增施钾肥可促进小麦的生长发育 ,增加产值 ,提高经济效益。 2年试验 ,小麦施钾分别增产 15 .5 6%～ 2 3 .5 0 %和 9.12 %～ 17.3 1% ,平均增产18.73 %和 13 .2 1% ;增收 3 5 0元 /hm2 左右 ,施用钾肥的产投比为 1.67～ 2 .5 9。综合小麦产量和施肥的经济效益 ,在当前生产水平下 ,淮北平原砂姜黑土地区小麦钾肥 (K2 O)的适宜施用量为 90kg/hm2 左右。

Study on the Technology of High-efficiency Potassium Fertilizer Application for Winter Wheat in Huaibei Plain

Field experiments about study on the technology of high-efficiency potassium fertilizer application for winter wheat was conducted at the same position of winter wheat- summer maize cropping system in Shajiang black soil region Huaibei plain. The results showed that potassium fertilizer application could obviously promote the growth of wheat, increase the output value and improve the economic benefit. Winter wheat yield of applying with potassium fertilizer increased by 15.56%～23.50% and 9.12%～17.31% with the average rate of growth 18.73% and 13.21% in 2000～2001and 2001～2002 compared with the control. The income was raised about 350 yuan/hm2 and the VCR (value cost ratio) reached 1.67～2.59 for potassium fertilizer application. At present production level, the suitable rate of potassium fertilizer application for winter wheat was about 90?kg K 2O/hm2 in Shajiang black Huaibei plain.