现代农业科技Issue(24)：80-81,84,3.
缺素对压砂西瓜产量、品质及叶绿素含量的影响
Effect of Deficiency Nutriment Elements on Sand Watermelon Yield ,Quality and Chlorophyll Content on Gravel-mulched Land
摘要
Abstract
A field experiment was conducted to study the effect of deficiency nutriment elements on watermelon yield ,quality and chlorophyll content. The results showed that the yield under whole amount of nitrogen, phosphorus and potassium nutrient solution increased 34.2%, the watermelon sugar content increased by 1.84 percentage points ,while enhancing disease resistance. Yield under potassium nutrient deficiency treatment increased 16.7%, but the sugar content reduced by 0.40 percentage points. Portable SPAD-502 chlorophyll meter could simply diagnose pressure sand watermelon nutrition. At extensor vine stage ,the SPAD value should be controlled from 54 to 56 ,this period SPAD value was lower than the range ,so that at fruit set stage we should increase the nutrient solution application rate. If the SPAD value was higher than the range,we should reduce the nutrient solution application rate. SPAD value of fruit set stage should be controlled from 57 to 59 ,nutrition diagnosis method could refer to vine growth stage. At fruit growing stage, the SPAD value should be controlled from 58 to 60.关键词
压砂西瓜/缺素试验/产量/品质/SPAD值Key words
sand watermelon/nutrient deficiency experiment/yield/quality/SPAD value分类
农业科技引用本文复制引用
李宪明,罗昀,赵天成..缺素对压砂西瓜产量、品质及叶绿素含量的影响[J].现代农业科技,2012,(24):80-81,84,3.基金项目
国际植物营养研究所项目（IPNI项目）（BFDP-Ningxia-2010）. （）
