土壤通气性对甘薯养分吸收、~(14)C同化物分配及产量的影响

选用鲁薯 7号和徐薯 1 8为材料 ,研究了土壤通气性对甘薯无机养分吸收、14 C 同化物分配和块根产量的影响。结果表明 :改善土壤的通气性可以增加叶片中钾、钙、锰、硼和锌的含量 ,增加块根中钾和钙的含量 ,减少块根中锰、硼和锌的含量 ,促进14 C 同化物由叶片向块根的运转和分配 ,提高块根中淀粉含量 ,极显著地提高了块根的产量。本文讨论了矿质元素在促进14 C 同化物由叶片向块根运输中的作用

EFFECTS OF THE SOIL AERATION ON NUTRIENT ABSORPTION, ~(14)C-ASSIMILATES DISTRIBUTION AND STORAGE ROOT YIELD IN SWEET POTATO

Using Ipomoea batatas (L.)Lam.cv Lushu7 and Xushu18 as materials,the effect of the soil aeration on mineral nutrition absorption, 14 C assimilates distribution in storage roots and storage root yield were studied.The results showed that the improved soil aeration could increase the content of potassium,calcium,manganese,boron and zinc in leaves,increase the content of potassium and calcium in storage roots,decrease the content of manganese,boron and zinc in storage roots,improve the transportation of 14 C assimilates,increase the starch content of storage roots and significantly increase the storage root yield.The role of mineral elements on improving the transportation of 14 C assimilates was discussed.