CAJ | 학술논문

三叶草在小麦-三叶草间作系统中起到为小麦提供氮肥的重要作用.中国科学院禹城综合试验站的田间试验评价了小麦-三叶草间作系统中刈割三叶草对三叶草固氮以及向小麦转移氮素的影响.利用15N自然丰度法测定了小麦-三叶草间作系统中氮素的转移.结果表明,整个生长季三叶草向小麦转移的氮量在34.4-57.5 kg· ha-1之间.与不刈割相比,刈割三叶草增加了土壤中累积的氮素,同时减少了小麦茎叶中氮浓度.将刈割的茎叶覆盖到小麦行间导致小麦茎叶中氮浓度的降低.该研究提供了小麦-三叶草间作系统中氮素从三叶草向小麦转移的量,为该间作系统在华北平原的推广提供参考依据.
삼협초재소맥-삼협초간작계통중기도위소맥제공담비적중요작용.중국과학원우성종합시험참적전간시험평개료소맥-삼협초간작계통중예할삼협초대삼협초고담이급향소맥전이담소적영향.이용15N자연봉도법측정료소맥-삼협초간작계통중담소적전이.결과표명,정개생장계삼협초향소맥전이적담량재34.4-57.5 kg· ha-1지간.여불예할상비,예할삼협초증가료토양중루적적담소,동시감소료소맥경협중담농도.장예할적경협복개도소맥행간도치소맥경협중담농도적강저.해연구제공료소맥-삼협초간작계통중담소종삼협초향소맥전이적량,위해간작계통재화북평원적추엄제공삼고의거.
The major function of clover in a winter wheat-white clover intercropping system is to supply nitrogen (N) for the wheat.A field experiment was conducted at Yucheng Comprehensive Station of the Chinese Academy of Sciences,to evaluate the effect of cutting white clover on N fixation and the transfer of fixed N to the associated winter wheat.A method of 15N natural abundance was used to determine the nitrogen dynamics in the intercropping system.The results showed that the amount of N transferred from the clover to the wheat,throughout the growing season,varied between 34.4 and 57.5 kg ha-1.Compared to leaving the clover standing,cutting the clover increased the amount of N that accumulated in the soil and also resulted in reduced N concentrations in the leaves and stems of the wheat.Using the cut clover as mulch between wheat rows led to decreased N concentrations in the wheat plants' leaves and stems.The present study provides preliminary information on the amount of N transferred from clover to wheat in an intercropping system.