摘要
通过田间试验研究了钾肥用量(K2O 75、150、225 kg/hm2)与种类对棉花产量、养分吸收及经济效益的影响。结果表明:施硫酸钾与硫酸钾镁都能增加产量,提高养分含量及经济效益,两者相比,在低、中、高3个水平上棉花产量前者比后者分别提高3.5%、3.2%和1.4%;相比硫酸钾镁,施硫酸钾可使棉花对氮、磷的吸收量增加,棉花根的氮含量平均增加13.9%,茎的磷含量平均增加2.7%,但对钾、钙、镁、硫的吸收量影响较少。施用硫酸钾比施用硫酸钾镁所获的效益平均高540元/hm2,且在施K2O 75 kg/hm2处理所获效益最高,比不施钾肥多获效益10 350元/hm2。
Effects of different K fertilizers and application rates （ K2O 75, 150 and 225 kg/hm2 ） on cotton yield, nutrient uptake and economic benefit were studied through a field experiment in fluvo-aquic soil. The results showed that cotton yields were significantly increased by application of potassium. Applying potassium sulfate compared with magnesium potassium sul- fate, cotton yield increased by 3.5% in low level, by 3.2% in middle level, and 1.4% in high level, respectively. The up- take of nutrient also increased in the treatments of both K fertilizers. However, different fertilizers affected nutrient contents in the plant. Compared to magnesium potassium sulfate, potassium sulfate fertilizer could make an average growth of 13.9% on accumulation of N in root and an average increase of 2. 7% on accumulation of P in stem, but a reduction of K, Ca, Mg and S. Relatively higher net income were obtained from K treatments in despite of higher input. Treatment of potassium sulfate fertilizer had a higher economic benefit than that of magnesium potassium sulfate, more than 540 yuan/hm2 in average. And the treatment of potassium sulfate in 75 kg/hm2 level had the maximum growth in economic benefits, 10 350 yuan/hm2 higher than the no-K fertilized treatment.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2014年第1期37-41,共5页
Soil and Fertilizer Sciences in China
基金
浙江浙农爱普贸易有限公司资助项目(20110402)
关键词
硫酸钾
硫酸钾镁
棉花
养分吸收
经济效益
potassium sulfate
magnesium potassium sulfate
cotton
nutrient uptake
economic benefit
