Proceedings of the Fifth Asian Regional Maize Workshop - Search ...

experiments showed that the fertilizer applied in this way could facilitate the early growth and
tasseling in the plant development and increase the grain yield by 1~ as compared with that of
conventional application (Table 3).
Table 3. Effect of two-layer fertilizer application on some agronomic characteristics and grain
yield in spring crop. 1987.
Location
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Chian Fengl ing Ave.
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Tassel Plt/hgt Ear Grain Tassel Plt/hgt Ear Grain Grain Yield
Treatment (days) (em) length yield (days) (em) length yield yield index
(em) (kg/ha) (em) (kg/ha) (kg/ha) (")
Two-layer 52 203 16 3,461 52 206 16 3,891 3,676 11O
appl ieation ~
Conventional 55 192 15 3,141 55 200 15 3,556 3,349 100
appl ieation £I
~ Compound fertilizer at 140-110-100 (N-P 2 0S-K 2 0) kg/ha applied as basal dressing in two layers.
£1 Compound fertilizer at 72-96-96 (N-P 2 0S-K 2 0) kg/ha applied as basal dressing and 70 kg/ha
nitrogen fertilizer applied as topdressing tb 50 em high plants.
4. Croppi ng system improvement:
Multiple cropping is a traditional agricultural production system in Taiwan. Paddy
rice is used to play an important role in maintaining sustainability in~this system. In the last
decade, due to the rapid decrease in rice consumption, new cropping systems have been developed
for paddy fields. Results from 5-year experiments proved that the cropping patterns which could
sustain soil fertility and offer a higher net income are: (R 1 ) Rice-Soybean-COrn, (R 2 ) Rice­
8esbania-COrn and (R 3 ) Sorghum-Soybean-COrn (Table 5).
In terms of average corn grain yield, R 1 gave the highest (7,198 kg/ha), whereas R 1 gave
the lowest (5,471 kg/hal. This was probably due to the green manure included in R 2 . Therefore,
organic matter content was higher in R than in that of other systems (Table 4).
Table 4. Differences in corn yield between various cropping systems tested in southern Taiwan
(1986-1990) •
Code
Cropping systems
Grain yield (kg/ha)
1986 1987 1988 1989 1990
Average
(kg/ha)
R1
R2
R3
Rice-Soybean-Corn
Rice-Sesbania-COrn
Sorghum-Soybean-COrn
7,232 3,352b 6,472b 4, 620b 5, 677cd 5,47lb
8,483 4,943a 9,025a 5,205b 8,332a 7,198a
7,522 3,062b 6,306b 5,400ab 6,585bc 5,775b
Means in the same column followed by the same letter do not differ significantly at 0.05%
probability level (DMRT).
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