The three treatments consisted of (1) the control (CK, no planting of oilseed
rape and planting of rice), (2) the rotation of Zhucang Huazi with rice, and (3) the
rotation of Chuanyou II-93 with rice. All 3.8 3.5 m2 plots were arranged in a
completely randomized design with three replicates per treatment. Seeds of
Zhucang Huazi and Chuanyou II-93 were sown in October of 2008, and the
seedlings were then transplanted into the plots in November with a planting
density of 16 plants m2
. After transplanting, basal fertilizers were applied at a rate
of 70 kg N ha1 in the form of urea and 9 kg ha1 of boron fertilizer. Additional
fertilizers were applied at a rate of 376 kg ha1 of a mixed fertilizer and
88 kg N ha1 in the form of urea in December and in January 2009, respectively.
Pesticides were sprayed during the growth of the oilseed rape when necessary as a
conventional practice. The oilseed rapes were harvested at maturity in May 2009.
After the oilseed rapes were harvested, all the plots were submerged in water to
prepare for rice cultivation. The Xiushui 113 rice seedlings were transplanted into
the plots in June 2009. Then basal fertilizer was supplied at a rate of 123 kg N ha1
in the form of urea in July. Additional fertilizers were supplied at a rate of
70 kg N ha1 in the form of urea and 376 kg ha1 in the form of a mixed fertilizer.
Pesticides were sprayed during the growth of rice when necessary. The rice was
harvested at maturity in September 2009.
The three treatments consisted of (1) the control (CK, no planting of oilseed
rape and planting of rice), (2) the rotation of Zhucang Huazi with rice, and (3) the
rotation of Chuanyou II-93 with rice. All 3.8 3.5 m2 plots were arranged in a
completely randomized design with three replicates per treatment. Seeds of
Zhucang Huazi and Chuanyou II-93 were sown in October of 2008, and the
seedlings were then transplanted into the plots in November with a planting
density of 16 plants m2
. After transplanting, basal fertilizers were applied at a rate
of 70 kg N ha1 in the form of urea and 9 kg ha1 of boron fertilizer. Additional
fertilizers were applied at a rate of 376 kg ha1 of a mixed fertilizer and
88 kg N ha1 in the form of urea in December and in January 2009, respectively.
Pesticides were sprayed during the growth of the oilseed rape when necessary as a
conventional practice. The oilseed rapes were harvested at maturity in May 2009.
After the oilseed rapes were harvested, all the plots were submerged in water to
prepare for rice cultivation. The Xiushui 113 rice seedlings were transplanted into
the plots in June 2009. Then basal fertilizer was supplied at a rate of 123 kg N ha1
in the form of urea in July. Additional fertilizers were supplied at a rate of
70 kg N ha1 in the form of urea and 376 kg ha1 in the form of a mixed fertilizer.
Pesticides were sprayed during the growth of rice when necessary. The rice was
harvested at maturity in September 2009.
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