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为探讨甘蔗-大豆间作模式对大豆鲜荚产量和农艺性状的影响,于2009—2011年连续3年在广州市华南农业大学农场进行大田试验,试验设置2种施氮水平(常规施氮(525kg·hm-2)和减量施氮(300kg·hm-2))和3种种植模式(甘蔗-大豆(1∶1)、甘蔗-大豆(1∶2)、单作大豆)。结果表明:甘蔗-大豆间作(1∶2)模式下,2009年减量施氮水平的大豆鲜荚产量较常规施氮水平提高了33%,2010和2011年不同施氮水平间均无显著差异;甘蔗-大豆间作模式对大豆的单株鲜荚重、多粒荚数和百粒鲜重无显著影响;大豆单株鲜荚重与多粒荚数在不同种植模式下均呈显著相关(P<0.05),在常规施氮间作模式下与大豆单株荚数呈显著相关(P<0.05)。甘蔗-大豆间作没有降低大豆的单株鲜荚产量,也没有对大豆的农艺性状产生负面影响,从增产增收、提高土地生产力来考虑,减量施氮模式下甘蔗-大豆间作具有一定的可行性。
In order to investigate the effects of sugarcane-soybean intercropping system on soybean fresh pod yield and agronomic traits, field experiments were conducted on the farm of South China Agricultural University in Guangzhou for three consecutive years from 2009 to 2011. Two nitrogen application rates (conventional nitrogen application (525 kg · Hm-2 and 300 kg · hm-2) and three planting modes (sugar cane-soybean (1: 1), sugar cane-soybean (1: 2) The results showed that in sugarcane-soybean intercropping (1: 2) mode, the yield of fresh soybean decreased by 33% compared with conventional nitrogen application in 2009, and there was no significant difference between 2010 and 2011 . The mode of sugarcane-soybean intercropping had no significant effect on the fresh weight, number of multi-pods and fresh weight of soybean per plant. The fresh weight per plant and number of multi-pods in soybean were significantly correlated (P <0.05), and there was a significant correlation (P <0.05) with the soybean pods per plant under conventional nitrogen application. Sugarcane-soybean intercropping did not reduce the yield of fresh pods per plant, nor did it have a negative impact on the agronomic characters of soybean. Considering the increase of production and the increase of land productivity, sugarcane-soybean intercropping with reduced nitrogen application was feasible .