Research Article

Corn and Soybeans in a Strip Intercropping System: Crop Growth Rates, Radiation Interception, and Grain Yield Components

Table 3

Corn and soybean grain yield components and grain yield in monocultures and intercropped, during C1, C2, and C3. Ear number per plant (ENP, n° pl−1), ear number per unit area (ENUA, n° m−2), pods number per plant (PNP, n° pl−1), pods per unit area (PUA, n° m−2), 1000-grain weight (1000 GW, g), grain number per plant (GNP, n° pl−1), and GNUA (n° m−2), GY (kg ha−1). Locations 1, 7, or 12 correspond to northern, central, and south rows, respectively. In the monoculture, the measurements were done at the center of the plot. Numbers in the same column followed by same letter are not significantly different ( ).

TreatmentLocation (rows)ENP (n° pl−1)ENUA (n° m−2)PNP (n° pl−1)PUA (n° m−2)
C1C2C3C1C2C3C1C2C3C1C2C3

Strip corn/soybean III11.5a1.6a1.6a12.6a14.8a14.8a
71.2a1.2b1.2b9.8a9.8bc9.8bc
121.6a1.6a1.6a13.4a13.4ac13.4ac
Strip corn/soybean V11.6a1.6a1.8a15a15a16a
71.2a1.2a1.2b10b10b10b
121.6a1.6a1.6ab14ab13ab14ab
Corn monocultureCenter1.2a1.1b1.1b9.6a8.4b8.4b

Strip soybean III/corn122d20d24d777d898d648d
739e37e38d1541d1360e1438d
1230ab26ab28a988d872de922d
Soybean III monocultureCenter37e34e35d1478d1304de1379d
Strip soybean V/corn125d24a28a1041d924d975d
735de33ab34ab1387d1231d1299d
1230de27ab28ab1446d1284d1354d
Soybean V monocultureCenter44e41e42e1808d1605d1694d

TreatmentLocatio (rows)1000 GW (g )GNP (n° pl−1)GNUA (n° m−2)GY (kg ha−1)
C1C2C3C1C2C3C1C2C3C1C2C3

Strip corn soybean III1308a316a312a474a677a699b6325a6267a6956a19456a19754a21669a
7292a297a294a487a628a555ab5052b4488b4792bc14495b13258b13975b
12323a330a325a425a649a640a6108ac5252c5667c19646a17267a18385c
Strip corn soybean V1317a328a324a799b686ab719b7454a6377a6686a23546a20916a21669a
7307a301a298a554ab531a524bc4792b4505b4724b14750b13490b13975b
12315a334a330a694ab639ab646ab6264a5328b5587b19454a17746c18385c
Corn monocultureCenter299a305a301a514a554a519a4561c4108c4288c13636b12520b12898b

Strip soybean III corn1172b165b167b1850d1400d1440d3169d2314d2406d
7170b166b168b2940d1800ef1860de5013d2994e3116e
12170b168b163b2110d1600df1720de3583d2678f2788f
Soybean III monocultureCenter162b160b167b2870d2010e2010e4633d3205e3336e
Strip soybean V corn1172b165b167b2130d1410d1440d3655d2317d2412d
7170b166b168b2550d2170e2260e4312d4312e3793e
12170b168b163b2300d1640de1770de3905d3905f2897f
Soybean V monocultureCenter162b160b167b2820d2150e2180e4566d4566e3612e