| Based on the result in the regional trial and the main problems found during Ninggeng 4 demonstration and extension,we investigated the growth pattern,plant type traits,sowing time and planting density,fertilizer and water management and pest control and other special test analysis of damage of Ninggeng 4.Consulting with the investigation on the result of high yield cultivation demonstration in agriculture production,we investigated the characteristics of yield formation of Ninggeng 4,and explored the precise and quantitative cultivation techniques of Ninggeng 4.The main results were as follows:The growth process of Ninggeng 4 were tested in the north area of the Yangtze River in 2011 and 2012.The results show that:in north area of Jiangsu province,growth period of Ningjing 4 was about 157d by manual transplanting and showed little change with the latitude in suitable region.This meanted that the planter could pay not much attention on the growth process of Ninggeng 4 by manual transplanting.But in the case of transplanting by machine,growth period of Ninggeng 4 showed about a week less with latitude decreasing.According the result in different area,the plant architecture characteristics of Ninggeng 4 were as follows:about 100cm height,about 3 effective spikes per plant,compact architecture,suitable length and width of the top 3 leafs,erect leafs and semi erect panicles,appropriate pedicel amount,higher amount of spikelet per plant and grains number per panicle,moderate 1000-grain weight.The plant architecture characteristics of Ninggeng 4 were accordant with the characteristics of high yielding or super high yield cultivation.According to the results in different area,mainly according to the result in Donghai County,we got the suitable sowing date and transplanting density of Ningjing 4.(1)In manual transplanting,the optimum sowing date is 5/8～5/18,while the suitable sowing time is 5/8 to 5/23,in drought seedling cultivation.The planting density was 2.0～2.5 million per 667m2 while the basic seedlings was 6 to 7 million per 667m2.(2)In machine transplanting,the sowing date was 5/25 to 5/28 and must be transplanted when the seedling age was 18 to 20 days.The appropriate density was about 1.8 million per 667m2 with basic seedling 6 to 8 million/667m2.According to the results in different area,mainly according to the result in Donghai County,the usage of nitrogen was nearly 22.5kg/667m2,with the usage ratio of 6:4 for tilling and panicle.During the cold and rainy weather,the nitrogen usage should be appropriately reduced in order to avoid the loss caused by lodging.The usage of other fertilizers and water management could be the same as traditional rice cultivation.During the research in many areas,Ninggeng 4 showed higher resistance:moderate resistance to rice blast and sheath blight,resistance to rice stripe virus,high resistance to rice leaf blight and rice black streaked dwarf virus.So we set down the prevention technology for main pests,diseases and weeds. |
