Universidade Estadual Paulista (UNESP), Department of Plant Production, Campus Jaboticabal, São Paulo, Brazil.
Universidad Nacional Agraria La Molina, Facultad de Agronomía, Departamento de Fitotecnia. Av. La Molina s/n, La Molina, Lima, PerúVEE.
PLoS One. 2018 Apr 26;13(4):e0194756. doi: 10.1371/journal.pone.0194756. eCollection 2018.
The objective of this study was to evaluate the influence of the spacing of lettuce rows on the production of a lettuce-rocket intercropping system over two growing seasons (11 August to 25 September 2011 and 12 January to 24 February 2012) in Jaboticabal, São Paulo, Brazil. We evaluated 11 treatments in each season: lettuce-rocket intercrops with five row spacings for the lettuce (0.20, 0.25, 0.30, 0.35 and 0.40 m) and the rocket planted midway between the lettuce rows, sole crops of lettuce at the same five row spacings and a sole crop of rocket. Fresh and dry masses of the lettuce and rocket and number of lettuce leaves per plant were highest with a lettuce row spacing of 0.40 m, but the productivities of the lettuce and rocket were higher with a lettuce row spacing of 0.20 m. The productivities and fresh and dry weights of the lettuce and rocket and the number of lettuce leaves per plant were highest in the sole crops, but the fresh and dry weights of the rocket were higher with intercropping. The land equivalent ratios were >1.0 in both seasons in all intercrops and were highest for the densest crop (1.41). Intercropping was therefore 41% more efficient than sole cropping for the production of lettuce and rocket.
本研究旨在评估生菜-芝麻菜间作系统在两个生长季（2011 年 8 月 11 日至 9 月 25 日和 2012 年 1 月 12 日至 2 月 24 日）中生菜行间距对其产量的影响，该研究在巴西雅博蒂巴进行。我们在每个季节评估了 11 种处理方法：生菜-芝麻菜间作，生菜行距分别为 0.20、0.25、0.30、0.35 和 0.40 米，且芝麻菜种植在生菜行之间，单独种植的生菜行距为上述五个行距，单独种植的芝麻菜。生菜行距为 0.40 米时，生菜和芝麻菜的鲜重和干重以及每株生菜叶数最高，但生菜行距为 0.20 米时，生菜和芝麻菜的生产力更高。单独种植时，生菜和芝麻菜的生产力、鲜重和干重以及每株生菜叶数最高，但间作时，芝麻菜的鲜重和干重更高。两个生长季所有间作的土地当量比均大于 1.0，最密作物（1.41）的土地当量比最高。因此，与单独种植相比，间作在生产生菜和芝麻菜方面的效率提高了 41%。
