| The experiment was conducted at the experimental farm of Chizhou city,Anhui Province during 2005 and 2007.The high yield rice variety zhizao038 and wuyunjing7 as experiment the material.Seting the treatment comparison no-tillage and plowing of the early rice and late rice,the treatment of seeding rate of the early rice and scatteredtransplanting density of late rice under the No-Tillage conditions and Proportion of Nitrogenous Fertilizer of the earlier rice and later rice under the No-Tillage conditions, Studies on the effects of the soil physics and chemistry character,the biological,characteristic,the community qualitative index,the benefit,the output and the quality,The main results are as follows:1.Study on the soil physics and chemistry character and the biological characteristic under under the no-tillage conditions and the research indicated:(1) The various soil layers' physics and chemistry character is improved after no-tillage cultivation,;the various soil layers physical character and majority of nutrient target improvement after 1 year no-tillage cultivation,the 0～5 cm soil layer the physical character and the partial nutrient target improvement,5～10 cm and 10～15 cm soil layer physical character and the majority of nutrient content plows were inferior to plowing seedling throwing after 2 year no-tillage cultivation,the various layers nutrient content and the physical character overall water drops equally after 3 year no-tillage cultivation(2) Activity of the soil the bacterium,good disposition azotobacter quantity and soil polyphenoloxidase of decrease under the No-Tillage conditions,But in the soil actinomycetes fungi,anaerobic-azotobacter and anaerobic cellulose decomposing,bacteriaincreased in quantity.2.Study on community qualitative index,output,quality and benefit of double-crop rice under under the no-tillage conditions,and the research indicated can be listed as follows:(1)The effective panicles per unit area,grain number per panicle,biomass,economic coefficient,leaf area index and yield were decreased in group when no-tillage paddy field compared with plowing paddy field,(the yield of early rice under the No-Tillage conditions was reduced 135.75 kg/hm~2 compared with plowing paddy field,the proportion of decrease is 1.77%;the yield of early rice was reduced 112.65 kg/hm~2,the proportion of decrease was 1.45%.Although had yield reduction,but the proportion of decrease had little) The percentage of brown rice,percentage of milled rice,percentage of head rice, transparence and chalkiness degree were significantly increased,But the leaf area index had reduces in each growing period(2) Not only save cost(save production cost of early rice and later rice were all 675.00元/hm~2,the amplitude were 6.04%and 5.93%;net output value and net income were all increased),high economic benefits,also increased farmers income,but also high ecological benefit,was also beneficial to ecological Environment when no-tillage paddy field compared with plowing paddy field3.Study on the effect of different sowing rate of early rice and different scatteredtransplanting density under under the no-tillage conditions on population quality index,yield and quality,the result of research can be listed as follows:(1) The effective panicles per unit area,biomass and yield of zhizao038 and wuyunjing7 were all significantly increased with increased sowing rate of early rice and increased scatteredtransplanting density of late rice;the yield of no-tillage direct seeding 90.0kg/hm~2 of early rice was reached 7835.55 kg/hm~2 and other treatments all were reach very significant level,the yield of no-tillage scattered-planting 52.5×10~4 pits/hm~2 of late rice was reached 7864.65 kg/hm~2 and other treatments all were also reach very significant level(2) The percentage of brown rice,percentage of milled rice,percentage of head rice and transparence were significantly decreased but chalkiness degree was significantly increased with increased sowing rate of early rice;The percentage of brown rice,percentage of milled rice,percentage of milled rice,percentage of head rice and chalkiness degree were significantly decreased while transparence was significantly increased4.Study on the effect of Application Rate of Nitrogen in earlier and later stages of early rice and late rice under the no-tillage conditions on population quality index,yield and quality,the result of research was as follows:(1) Under the condition of same the no-tillage,nitrogen rate and density,The total dry matter accumulation and effective panicles per unit area all was decreased,with decreasing Proportion of Nitrogenous Fertilizer of basic tiller fertilizer and increasing Proportion of Nitrogenous Fertilizer of panicle fertilizer.The number of spikelet per panicle,seed setting rate,1000-grain weight and dry matter accumulation of late growth stage especially in the heading-mature period were all significantly increased,thus making yield increased significantly. (2)The processing quality of zhizao038 of early rice and wuyunjing7 of late rice was significantly increased when increased Proportion of panicle fertilizer,But the appearance quality of rice was becomed inferior,and the amylase was slightly increased... |
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