不同光温环境对日光温室黄瓜氮磷钾吸收分配的影响

 研究了华北地区秋冬、冬春不同季节茬口日光温室内的不同光温环境对黄瓜氮、磷、钾吸收分配的影响。结果表明 ,温室内黄瓜结瓜期的光温环境变化 ,冬春茬较秋冬茬利于黄瓜根系发育和对氮、磷、钾的吸收分配。冬春茬黄瓜根系生长速率、根系活力均比秋冬茬高。冬春茬黄瓜对氮、磷、钾的吸收不断增加 ,秋冬茬则不断下降。结瓜期的光温环境显著影响氮、磷、钾在黄瓜不同部位的分配。黄瓜生育前期氮、磷、钾以向茎叶分配为主 ,结瓜后向果实的分配增加

Effect of Light and Temperature on Uptake and Distribution of Nitrogen, Phosphorus and Potassium of Solar Greenhouse Cucumber

The influence of different light and temperature conditions inside solar greenhouse of winter spring and autumn winter crops of different seasons in northern China on uptake and distribution of nitrogen, phosphorus and potassium in cucumber was studied. The results showed that light and temperature conditions inside solar greenhouse at fruit bearing stage changed,plant root development and uptake and distribution of N, P and K benefited from these change in winter spring compared with autumn winter crop. Root volume and root activity increased more rapidly in winter spring than in autumn winter. Uptake of total N, P 2O 5 and K 2O enhanced with plant development and inside light and temperature changes in winter spring, whereas it declined in autumn winter crops. Distribution amount of total N, P 2O 5 and K 2O at different parts of cucumber at fruit bearing stage was significantly influenced by inside light and temperature in solar greenhouse. Distribution of total N, P 2O 5 and K 2O in leaf and stem were dominant at early stage and in fruits increased since fruit bearing.