Faba bean is less susceptible to fertiliser N impacts on biological N2 fixation than chickpea in monoculture and intercropping systems
Faba bean is less susceptible to fertiliser N impacts on biological N2 fixation than chickpea in monoculture and intercropping systems
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DOI：
10.1007/s00374-015-1062-8
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发表时间：
2016-02
影响因子：
6.5
通讯作者：
Terry J. Rose;Cecile C. Julia;M. Shepherd;M. Rose;L. Zwieten
中科院分区：
文献类型：
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作者：
Terry J. Rose;Cecile C. Julia;M. Shepherd;M. Rose;L. Zwieten
高氮（N）肥料成本和可持续性问题增加了在矮林种植园作物的行间种植豆类作物的兴趣。在这样的系统中可能需要补充氮肥，因为豆类来源的N的可用性可能不匹配树的N需求峰值，但这种添加的氮肥可能会抑制行间豆类的生物固氮（%BNF）。我们假设，一些豆类品种可能不太容易受到氮肥诱导的抑制%生物固氮，因此更适合作为豆类行间作物。我们比较了四种氮肥施用量（0、50、100和150 kg N ha−1）对蚕豆（Vicia faba）和鹰嘴豆（Cicer arietinum）的生物固氮百分比的影响，这两种作物分别在已建立的互叶白千层种植园中种植为行间豆科作物和在温室盆栽试验中种植为单作作物。在150 kg N ha−1时，两个物种的N2固定都没有被完全抑制，在田间和温室中蚕豆的生物固氮维持在40%左右，在田间和温室中鹰嘴豆的生物固氮维持在35%左右，生物固氮维持在23%左右。在田间间作时，蚕豆在100 kg N ha− 1时的生物固氮百分比显著高于鹰嘴豆，在温室间作时，蚕豆在100和150 kg N ha− 1时的生物固氮百分比显著高于鹰嘴豆，这与蚕豆对氮的需求较高有关。结果表明，在土壤条件适合任何一个物种，蚕豆是更适合作为一个绿色肥料间作比鹰嘴豆时，需要补充氮肥。
High nitrogen (N) fertiliser costs and sustainability concerns have increased interest in cultivating legume crops in the inter-row in coppiced plantation crops. Supplemental N fertiliser applications are likely needed in such systems because the availability of legume-derived N may not match peak tree N demand, but this added N fertiliser will likely suppress biological N2fixation (%BNF) in the inter-row legumes. We hypothesised that some legume species may be less susceptible to N fertiliser-induced suppression of %BNF and are therefore better suited as legume inter-row crops. We compared the impact of four rates of N fertiliser (0, 50, 100 and 150 kg N ha−1) on %BNF in faba bean (Vicia faba) and chickpea (Cicer arietinum) when cultivated as inter-row legume crops in an establishedMelaleuca alternifoliaplantation and as a monoculture in a glasshouse pots trial. N2fixation was not completely suppressed in either species at 150 kg N ha−1, with around 40 %BNF maintained in faba bean in the field and glasshouse and around 35 %BNF and 23 %BNF maintained in chickpea in the field and glasshouse, respectively. Faba bean had significantly higher %BNF than chickpea at 100 kg N ha−1when intercropped in the field, and at 100 and 150 kg N ha−1in the glasshouse, associated with a higher shoot N demand in faba bean. The results suggest that where soil conditions are suitable for either species, faba bean is more suitable as a green manure intercrop than chickpea when supplementary N fertiliser additions are required.