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首页> 外文会议>ACIAR Proceedings no.115; Workshop on Tropical Legumes for Sustainable Farming Systems in Southern Africa and Australia; 20021007-09; Limpopo Province(ZA) >Description of the iophysical Environment of Three Maize-producing Areas in the Limpopo Province of the Republic of South Africa and the Validation of APSIM to Simulate Maize Production
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Description of the iophysical Environment of Three Maize-producing Areas in the Limpopo Province of the Republic of South Africa and the Validation of APSIM to Simulate Maize Production

机译：南非共和国林波波省三个玉米产区的物理环境描述和APSIM模拟玉米生产的验证

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摘要

The focus of this paper is to provide background biophysical information and test the performance of the APSIM (Agricultural Production Systems sIMulator) maize model on several data sets collected at the field sites used in the Limpopo Province of South Africa during the ACIAR project AS2/96/149 described in these proceedings. The project targeted one community of smallholder farmers at Dan in the Mopani district of Limpopo, with the aim of improving their dryland cropping systems. A site called Syferkuil, located on the University of the North's experimental farm, and a nearby site called Dalmada, on a farmer's field, were also the location of several maize-intercropping/relay planting field trials. Using the data of the sole-maize control treatments from these trials, APSIM-Maize V3.2 predicted the biomass accumulation with a high degree of precision (r~2 = 0.82). Factors such as grazing damage, severe frost and striga infection that reduced the observed grain yield resulted in general over-prediction of simulated grain yield. Simulating maize production without N inputs under dryland conditions at Dan, using long-term weather records (1975-2002), indicates poor maize grain yields (< 1000 kg/ha) and several crop failures. The application of 30 or 60 kg/ha N fertiliser increased maize yields to 1700 and 2600 kg/ha in 50% of seasons.
机译：本文的重点是提供背景生物物理信息，并在ACIAR项目AS2 / 96期间，在南非林波波省使用的田间地点收集的数个数据集上，测试APSIM（农业生产系统仿真器）玉米模型的性能这些程序中描述的/ 149。该项目针对林波波省莫帕尼地区丹的一个小农户社区，旨在改善其旱地种植系统。位于北部大学实验农场的一个名为Syferkuil的地点，以及位于一个农民田地附近的一个名为Dalmada的地点，也是几个玉米间作/中继种植田间试验的地点。 APSIM-Maize V3.2使用这些试验中唯一玉米对照处理的数据，可以高度准确地预测生物量积累（r〜2 = 0.82）。诸如放牧损害，严重霜冻和杂草丛生等因素降低了观测到的谷物单产，导致对模拟谷物单产的普遍高估。使用长期的天气记录（1975-2002年），在丹特旱地条件下模拟没有氮输入的玉米生产，表明玉米单产低（<1000千克/公顷），并且几次歉收。在50％的季节中，施用30或60 kg / ha的氮肥可使玉米单产提高到1700和2600 kg / ha。

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