It is known that biochar could improve soil, fix carbon and reduce discharge. A field experiment was conducted in northeast area of Jiangxi province in 2013 to study the effects of different biochar rates , which included four treatments: CK （no biochar）, BC20 （20 t/hm2 biochar）, BC30 （30 t/hm2 biochar）, BC40 （40 t/hm2 biochar）, on early and late rice dry matter accumulation, leaf area index, root bleeding sap and grain yield. The results showed that: biochar application（20～40 t/hm2） could increase grain yields by 6.8%～15.3% and 1.5%～16.7%, dry matter accumulation by 8.1%～23.5% and 15.3%～22.7%, leaf area index in heading stage by 47.9%～91.6% and 7.6%～23.3%, and root bleeding sap by 15.1%～47.2% and 21.2%～65.4% compared with CK. Meanwhile, it showed that the yield and growth indexes were raised gradually with biochar amounts increasing. This indicated that application of biochar could promote rice growth and increase the grain yield in double rice cropping systems.
LIU Kai-Lou-1, XIA Gui-Long-2, LI Ya-Zhen-1*, YU Pao-Lan-1
. Effects of Different Biochar Fertilizer Rates on Early and Late Rice Growth and Yield in Northeast Area of Jiangxi province[J]. China Rice, 2015
, 21(4)
: 91
-94
.
DOI: 10.3969/j.issn.1006-8082.2015.04.020
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