In order to study the effects of longterm notillage direct seeding mode on crop yield and soil physiochemical properties in rice/rapeseed rotation system, a comparison experiment with watersaving and droughtresistance rice (WDR) variety and a double low rapeseed variety was conducted under notillage direct seeding mode (NTDS) and conventional tillage direct seeding mode (CTDS) for 4 years, with CTDS as control. The results showed that the actual yield of WDR decreased by 8.10% at the first year, then the plant height, the spikelet number per panicle, the seed setting rate, the 1000grain weight, grain yield, actual yield and harvest index increased with increasing notillage years, which led to an actual yield increase of 6.49% at the 4th year, compared with CTDS. Correlation analysis showed that the panicle length was significantly related to WDR’s actual rice grain yield. Under CTDS，decreased plant height, pod number per plant, 1000grain weight of rapeseed led to the loss of actual rice yield, and the loss decreased with notillage years, the actual yield under NTDS was the same as that under CTDS at the 4th year. Correlation analysis showed that the seed number per pod were significantly related to rapeseed’s actual yield. Compared with CTDS, the pH value of NTDS decreased every year, the contents of soil organic matter and the total N of the NTDS increased. The NTDS mode are propitious to improve the paddy soil fertility in the top layer(0-5 cm). In the top layer under NTDS mode, the soil bulk decreased, while the contents of soil organic matter, the total N and the available N increased; in the 5-20 cm layer under NTDS mode, the soil bulk, the contents of soil organic matter, the total N increased, while the available N,K decreased. NTDS is benefit to increase the crop yield under the test. And it is propitious to improve the paddy soil fertility in the top layer.
DU Xingbing1,2, LUO Lijun1 , CHEN Chen1, LI Shuangxi3, LIU Guolan1, WANG Feiming1, ZHANG Anning1, GU Xiaojun2, YU Xinqiao1,2,*
. Effects of LongTerm NoTillage Direct Seeding Mode on Crop Yield and Soil Physiochemical Properties in Rice/Rapeseed Rotation System[J]. Chinese Journal OF Rice Science, 2013
, 27(6)
: 617
-623
.
DOI: 10.3969/j.issn.1001-7216.2013.06.008
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