Table 1 Effects of ridge and furrow rainfall concentration (RC) combined with mulching on the corn grain yield, yield components, and water use efficiency (WUE) during 2007–2010.

From: Effect of Different Mulches under Rainfall Concentration System on Corn Production in the Semi-arid Areas of the Loess Plateau

Year

Treatment

Yield (kg ha–1)

100-seed weight (g)

Seed number per ear

ET(mm)

WUE(kg ha–1 mm–1)

2007

RCSS

6857.0 ± 299.6a

31.1 ± 0.7a

335.6 ± 12.1a

374.7

18.3 ± 0.8a

RCSD

5940.2 ± 221.4b

30.4 ± 0.5a

292.0 ± 10.3b

373.6

15.9 ± 0.6c

RCSB

6737.3 ± 169.3a

29.5 ± 0.6a

345.4 ± 14.7a

378.5

17.8 ± 0.4ab

RCSL

6316.4 ± 195.4b

28.4 ± 1.0ab

336.4 ± 11.7a

369.4

17.1 ± 0.5b

RCSN

5163.0 ± 234.5c

25.2 ± 0.7b

305.2 ± 9.6b

333.1

15.5 ± 0.7c

CF

4153.4 ± 182.4d

24.1 ± 0.9b

257.4 ± 11.5c

314.7

13.2 ± 0.6d

2008

RCSS

7916.7 ± 304.1a

32.9 ± 1.1a

369.8 ± 11.8a

399.8

19.5 ± 0.8a

RCSD

7104.2 ± 256.3b

31.4 ± 1.0a

330.2 ± 8.6c

413.0

16.2 ± 0.6b

RCSB

7757.0 ± 208.4a

31.5 ± 0.8a

368.2 ± 10.5a

410.4

18.9 ± 0.5a

RCSL

7514.0 ± 240.2ab

29.7 ± 0.9a

375.3 ± 14.3a

410.6

18.3 ± 0.6ab

RCSN

6319.5 ± 224.3c

26.5 ± 0.9b

356.5 ± 11.8a

392.5

16.1 ± 0.6b

CF

4881.8 ± 208.4d

23.4 ± 1.1c

318.8 ± 10.6d

341.4

14.3 ± 0.6c

2009

RCSS

7638.5 ± 238.6a

31.9 ± 0.9a

358.0 ± 12.8a

406.3

17.8 ± 0.6a

RCSD

6855.2 ± 198.8b

29.5 ± 1.2a

346.4 ± 11.4a

418.0

15.4 ± 0.5b

RCSB

7419.3 ± 212.1a

31.2 ± 1.0a

358.5 ± 12.3a

398.9

17.6 ± 0.5a

RCSL

7150.6 ± 172.3ab

28.4 ± 1.3a

375.5 ± 10.8a

390.7

17.3 ± 0.4a

RCSN

6357.2 ± 185.6c

26.7 ± 0.8b

358.0 ± 12.0a

392.4

15.2 ± 0.5b

CF

4211.1 ± 159.1d

22.7 ± 0.7c

277.1 ± 11.6b

307.4

12.7 ± 0.5c

2010

RCSS

7725.6 ± 227.4a

32.9 ± 0.9a

351.1 ± 12.7a

419.9

18.4 ± 0.5a

RCSD

6756.7 ± 212.6b

31.4 ± 1.2a

320.6 ± 10.4b

430.4

15.7 ± 0.6b

RCSB

7455.6 ± 196.3a

32.5 ± 0.8a

346.9 ± 11.6a

409.6

18.2 ± 0.5a

RCSL

7231.5 ± 153.4ab

30.6 ± 0.7a

356.3 ± 10.5a

406.3

17.8 ± 0.6a

RCSN

6537.4 ± 165.7c

27.5 ± 1.3b

357.4 ± 9.3a

408.6

16.0 ± 0.4b

CF

5142.3 ± 162.3d

25.4 ± 1.1c

300.5 ± 11.5c

380.9

13.5 ± 0.6c

Mean

RCSS

7534.5 ± 267.4a

32.2 ± 0.9a

353.6 ± 12.4a

400.2

18.5 ± 0.7a

RCSD

6664.1 ± 222.3b

30.7 ± 1.0a

322.3 ± 10.2b

408.8

15.8 ± 0.6b

RCSB

7342.3 ± 196.5a

31.2 ± 0.8a

354.8 ± 12.3a

399.4

18.1 ± 0.5a

RCSL

7053.1 ± 190.3ab

29.3 ± 1.0a

360.9 ± 11.8a

394.3

17.6 ± 0.5a

RCSN

6094.3 ± 202.5c

26.5 ± 0.9a

344.3 ± 10.7a

381.7

15.7 ± 0.6b

CF

4597.2 ± 178.1d

23.9 ± 1.0a

288.5 ± 11.3c

336.1

13.4 ± 0.6c

  1. Note: RCSS: 0.08 mm thick plastic film; RCSD: corn straw; RCSB: 8% biodegradable film; RCSL: liquid film; RCSN: bare furrow; CF: conventional flat (control); ET: evapotranspiration. Means ± SE within a column followed by the same letters do not differ significantly at the 5% level (Duncan’s multiple range test).
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