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首页> 外文期刊>New Zealand Journal of Crop and Horticultural Science >Effect of early blight (Alternaria solani) and different nitrogen inputs on radiation interception, radiation use efficiency, and total dry matter production in potatoes (Solanum tuberosum) grown in Canterbury, New Zealand
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Effect of early blight (Alternaria solani) and different nitrogen inputs on radiation interception, radiation use efficiency, and total dry matter production in potatoes (Solanum tuberosum) grown in Canterbury, New Zealand

机译：早疫病（Alternaria solani）和不同氮输入量对新西兰坎特伯雷马铃薯（Solanum tuberosum）种植的马铃薯（Solanum tuberosum）的辐射截留，辐射利用效率和总干物质产量的影响

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Abstract Field experiments were conducted in 1995/96 and 1996/97 to investigate the effect of early blight epidemics on photosynthetically active radiation (PAR) interception (RI), radiation use efficiency (RUE), and total dry matter (TDM) production of potatoes (Solanum tuberosum) grown in Canterbury, New Zealand. RI was calculated from green leaf area index (GLAI) corrected for disease. RUE was calculated as the ratio between accumulated TDM and accumulated RI. Early blight reduced RI by 9% in both seasons and RUE by 17% and 28% in 1995/96 and 1996/97 respectively. There was a total loss of 26% and 36% in TDM in 1995/96 and 1996/97 respectively. Nitrogen inputs increased RUE by 3% and 16% as compared to low nitrogen status in 1995/ 96 and 1996/97 respectively. Results showed that RI and RUE, calculated from leaf area index (LAI), not corrected for disease, underestimated the loss in RI and RUE.
机译：摘要在1995/96年和1996/97年进行了田间试验，研究了早疫病流行对马铃薯光合有效辐射（PAR）的截留（RI），辐射利用效率（RUE）和总干物质（TDM）产量的影响。 （Solanum tuberosum）生长在新西兰的坎特伯雷。 RI由针对疾病校正的绿叶面积指数（GLAI）计算得出。 RUE计算为累积TDM与累积RI之比。在1995/96年和1996/97年，早疫病使两个季节的RI降低了9％，RUE降低了17％和28％。 1995/96年和1996/97年，TDM的总损失分别为26％和36％。与1995/96年和1996/97年的低氮状态相比，氮输入使RUE分别增加了3％和16％。结果表明，根据叶面积指数（LAI）计算的RI和RUE未进行疾病校正，但低估了RI和RUE的损失。

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