Bottega Eduardo Leonel, Pinto Ederson Bitencourt, Saretta Ezequiel, Oliveira Zanandra Boff de, Severo Filipe Silveira, Assmann Johan
Academic Coordination, Campus Cachoeira do Sul, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
Sensors (Basel). 2024 Nov 26;24(23):7552. doi: 10.3390/s24237552.
This study aimed to analyze yield components and maize yield cultivated at different population densities in management zones (MZs) delimited based on mapping the spatial variability of the soil's apparent electrical conductivity (ECa). The soil ECa was measured, and two MZs were subsequently delimited, one with low ECa and the other with high ECa. In each MZ, four maize sowing densities were tested: 60,000 (D1); 80,000 (D2); 100,000 (D3); and 140,000 (D4) seeds ha. Ear length, number of grains per ear, number of grains per row, number of rows per ear, thousand-grain weight, and yield were evaluated. The increase in sowing density in the high ECa MZ linearly reduced the values of ear diameter, number of rows per ear, number of grains per ear, and thousand-grain weight. Sowing density D3, when implemented in the low ECa MZ, showed higher values for the ear length, ear diameter, number of grains per row, number of grains per ear, and thousand-grain weight. Sowing density D2 was the one with the highest yield, regardless of the MZ where it was implemented (5628.48 kg ha in the high ECa management zone and 4463.63 kg ha in the low ECa).
本研究旨在分析基于土壤表观电导率（ECa）空间变异性绘制而划定的管理区（MZs）内，不同种植密度下玉米的产量构成因素和产量。测量了土壤ECa，随后划定了两个MZs，一个ECa值低，另一个ECa值高。在每个MZs中，测试了四种玉米播种密度：60,000（D1）；80,000（D2）；100,000（D3）；和140,000（D4）粒/公顷。评估了穗长、每穗粒数、每行粒数、每穗行数、千粒重和产量。在高ECa的MZ中，播种密度的增加线性降低了穗直径、每穗行数、每穗粒数和千粒重的值。当在低ECa的MZ中采用播种密度D3时，穗长、穗直径、每行粒数、每穗粒数和千粒重的值更高。无论在哪个MZ实施，播种密度D2的产量最高（在高ECa管理区为5628.48千克/公顷，在低ECa管理区为4463.63千克/公顷）。
