Agriculture Reference
In-Depth Information
than 15t/ha. In 2001, the researchers of Fujian Academy of
Agricultural Sciences used the 'Teyon 175' and 'Ilyouming
86' in Taoyuan county which is the famous region of rice
ultra high production making the rice yield records of 17.7t/
ha and 17.9t/ha respectively. If the altitudes are different the
average daily temperature of the whole growth period will be
various, which will further infl uence the days of whole growth
period and the seed setting rate decreases with the increase in
altitude. The reason is that the low temperature restrains the
transportation and content from the assimilate to grain which
cannot be fully made use of. As to the infl uence of altitude on
the grain number and the effective panicles, an experiment in
Mianyang, Sichuan province where altitude ranges from 400
to 1400 m, has showed that the productivity with the increase
of altitude, yield, the effective panicles and number of grains
fi rst increased and then decreased.
It has been reported that the quantity of grain of the
same variety in Yunnan Taoyuan cultivated in Fujian
Longlal, cultivated more than 50-60% area, and obtained
a higher yield. This further showed that the effective
panicles is the main reason of high yield about 'Shanyou
63' of Taoyuan county in Yunnan province the quantity
of which is 59.9% higher than the average compared to
Taoyuan county in Yunnan province (with an altitude of
1107 m) and Binchuan county (1438 m) and Hangzhou high
yielding rice fi eld differences. The results showed that compared
with Hangzhou, Yunnan rice planting area increased blossom
quantity mainly through the enhancement of the effective
panicles and quantity of grain (Lang and Jichao 2012).
Studies on the phenology and yield activity of Basmati fi ne
rice genotypes at Bangladesh, as infl uenced by planting date
in monsoon season experienced a variation in yield. The late
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