| The experiment was conducted in 2018 at the Daxing Farm Science and Technology Park of the Jiansanjiang Administration.Longjing 46 was used as the test variety to carry out high-yield,high-yield,high-density research with a split area design,and the best fertilizer and density under the high-yield cultivation model of wide and narrow lines was selected.It aims to provide theoretical guidance and technical support for agricultural machinery and agronomy supporting in Sanjiang area.The main research results are as follows:1.Compared with the local conventional fertilization and density,the population's high efficient leaf area index and effective spikelet number were significantly increased under the constant increment of 10%,pit spacing of 12 cm and pit spacing of 5%,and pit spacing of 12 cm.Among them,the high efficient leaf area index and effective spikelet number reached the maximum when the constant increment of 10%,pit spacing of 12 cm interaction,which were 519 million and 411 million per hm~2,respectively,and increased by 8.80% and 8.73% compared with the control.Under this configuration,the grain-leaf ratio of population was suitable,which avoided the excessive transporting of Photosynthate from rice leaves to panicles and prevented premature senescence.2.Compared with the tillering stage and maturity stage,the amount of fertilizer applied and the distance between the holes at heading and fruiting stages had significant effects on the dry matter quality of the population.The dry matter quantity of the two periods was significantly higher than that of the control at the constant increment of 5%,the distance between the holes of 12 cm and 10%,and the distance between the holes of 12 cm,r eaching 8.64 t/hm~2 and 12.50 t/hm~2,and the dry matter quantity of the two periods was in accordance with the yield.Significant positive correlation.In addition,the transformation amount and transport rate of stem and leaf substances were suitable under this configuration.The assimilation amount and contribution rate of assimilation after heading reached(6.99-7.13)t/hm~2 and(78.63-79.24)%.3.The agronomic utilization rate of nitrogen fertilizer reached the highest when the constant increment was 5% and the pit distance was 12 cm,with the value of 53.10 kg/kg,followed by the combination of the lateral deep fertilization constant and the pit distance of 14 cm.The partial productivity of nitrogen fertilizer was 113.30 kg/kg,followed by the constant increment of 5% and the pit distance of 12 cm.In addition,the nitrogen grain production efficiency and nitrogen dry matter production efficiency reached the highest under the condition of side deep fertilization constant and pit spacing of 14 cm,respectiv ely,156.3 kg/kg and 93.5 kg/kg.4.Under the broad and narrow cultivation model,the amount of fertilizer applied and the pitch and its intercropping have a significant impact on the yield.Under the constant increase of 5 % and the pitch of 12 cm,not only the effective number of hectares in the high-yielding population is satisfied.Moreover,it has also significantly increased the number of grain grains,the weight of thousands,and the yield of rice,and the correlation between the number of grain grains,the weight of thousands,and the yield of rice has been significantly and positively correlated,which has promoted the increase of rice yield and the yield is as high as 10.70 t/hm~2.Compared with the control,the increase in net benefit was 8.08 %,The net benefit increased to the maximum,and the benefit per hectare reached 1984.44 yuan.. |
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