酸性低钾土硫酸钾镁肥对花生生长及养分吸收的影响  

Effect of sulphate-potassium magnesium on growth and nutrient absorption of peanut in poor-K acid soil

作　　者：王飞[1] 李清华[1] 何春梅[1] 林诚[1] 李昱[1] 林新坚[1] 

机构地区：[1]福建省农业科学院土壤肥料研究所,福州350013

出　　处：《中国生态农业学报》2009年第6期1090-1093,共4页Chinese Journal of Eco-Agriculture

基　　金：福建省农科教结合项目(闽财指[2007]573号);福建省农业科学院院管课题资助

摘　　要：在供钾水平较低的酸性赤砂土上,采用盆栽试验方法研究硫酸钾镁对花生生长发育及养分吸收的影响,结果表明:随硫酸钾镁用量的增加,花生经济产量与生物总量呈先增加后降低的趋势。施硫酸钾镁513mg·kg-1(土)处理(相当于每千克土施K2O0.12g、Mg0.028g、S0.09g),花生产量最高,经济产量与生物总量分别较对照增加20.2%和32.2%。随硫酸钾镁用量的增加,植株对钾、镁、硫各吸收量均有不同程度增加,其中对钾、硫吸收量呈逐渐升高的趋势,而对镁吸收量呈先升高后降低的趋势,植株对钾、镁吸收表现正相关。随硫酸钾镁用量的增加,花生果仁粗蛋白与粗脂肪均较对照有所提高,粗蛋白含量呈逐渐增加,而粗脂肪含量却呈逐渐下降趋势。在酸性低钾、中镁、潜在性缺硫的赤砂土上,花生施用硫酸钾镁肥,钾镁养分吸收呈显著正相关,但钾硫相关性不明显。A pot experiment was carried out to determine the effects of sulphate-potassium magnesium fertilization level on the growth and nutrient absorption of peanut in poor-K acid sandy soil. The results show an improvement in economic and total biological yields of peanuts, which subsequently drop with increasing sulphate-potassium magnesium application levels in the soil. Peanut yield is highest at 513 mg sulphate-potassium magnesium per kg of soil （corresponding to 0.12 g K2O, 0.028 g Mg and 0.09 g S per kg soil）, with economic and total biological yields improve by 20.2% and 32.2% respectively over CK. With increasing sulphate-potassium magnesium application level, the respective absorptions of K, Mg and S variously improve. The absorptions of K and S steadily improve, while the absorption of Mg initially increases and subsequently drops. Correlative interactive effects of absorption of K and Mg are positive. Peanut quality increases with increasing sulphate-potassium magnesium application level, and coarse protein and fat contents of nutlet variously improve over CK. The content of coarse protein steadily increases, whereas that of coarse fat steadily drops. This suggests that in the acid sandy soil with low level of K, middle level of Mg, and potential S stress, fertilizing peanuts with sulphate-potassium magnesium leads to a significant positive correlation between K and Mg absorption. However, the correlation between K and S absorption is not so obvious.

关 键 词：硫酸钾镁 花生 生长 养分吸收 果仁品质 

分 类 号：S143[农业科学—肥料学] S158[农业科学—农业基础科学]