苎麻肥料效应的研究

适量施用尿素能增加苎麻产量,“黄壳早”以全年亩施55kg,“芦竹青”以全年亩施75kg的产量最高,分别比对照增产35.5%和36.4%,合理氮、钾肥配比是提高苎麻产量和品质的重要技术措施,施钾能提高苎麻产量,以亩施尿素30kg和KCl20kg的经济效益高,平均比对照提高产量16.5%,此外,根外喷施0.5%和0.8和KCl,有防止花叶病的作用,以0.8%防效最高,喷施硼、锰、锌微肥对苎麻产量和品质有良好作用,在酸性土壤上,喷0.1%硼肥平均增产11.6%;在石灰性土壤上喷0.2%硼砂,平均增产4.6%;喷锰,锌微肥各试验点比对照平增产7.2%。

EFFECTS OF FERTIZERS ON RAMIE

The paper shows that applying optimum amount of urea in ramie fieldincreases the vegetative growth and fiber yield. 55kg/mu of urea for Huangke-zao and 75kg/mu for Luzhuqing per year result in the highest fiber yield,which is on average 35.5% and 36.4% higher than control respectively.The important technical measure for quality and high yield of ramie fiberis balanced nitrogen and potassium application. The optimal proportionof 30 kg/mu of urea and 20 kg/mu of KC1 heightents on average fiber yield by16.5% over control, resulting in the highest economic efficiency. Moreover,foliar application with 0.5% and 0.8% KC1 solution prevents the incidenceof chlorosis. Application of micronutrients improves fiber quality and in-creases yield as follows. 0.1% sodium teraborate (Na_2B_4O_7) in acid soil in-creases 11.6%, 0.2% sodium teraborate in limestone soil 4.6% and Mn andZn 7.2% on average.