【摘 要】
：
D297优63和D297优67是籼型D297A不育系分别与明恢63、明恢67两个恢复系配组选育的有粳型血缘的籼稻杂优新组合。一、试验示范表现D297优63 尤溪县管前乡农技站于1986年从四
论文部分内容阅读
D297优63和D297优67是籼型D297A不育系分别与明恢63、明恢67两个恢复系配组选育的有粳型血缘的籼稻杂优新组合。一、试验示范表现D297优63 尤溪县管前乡农技站于1986年从四川农业大学引进D297A、D297B进行繁制种研究及其配组杂交,1987年开始对D297优63杂种进行试验示范。同年在尤溪管前作单季试种,亩产达578.5公斤,比汕优63亩增42.3公
D297you63 and D297you67 were indica hybrids of japonica type with the indica D297A male sterile line and the two restorer lines of Minghui63 and Minghui67 respectively. First, the pilot demonstration of performance D297 Youxiu Township Guanqianxiang Agricultural Technology Station in 1986 from Sichuan Agricultural University to introduce D297A, D297B for breeding species and hybrids, starting in 1987 D297 You 63 hybrid demonstration . In the same year, you made a single season test in front of Youxi, with a yield of 578.5 kg per mu and an increase of 42.3 km compared to that of Shanyou 63 mu
其他文献
磷肥施入土壤后，短期内会在肥料颗粒周围的肥际微域内形成很高的养分浓度，而高浓度的磷酸根离子对土壤矿物具有强烈的破坏作用，因此肥际反应可能对磷肥的有效性有着至关重要的作
On the basis of analyzing both domestic and foreign evaluation systems for the e-govement and also taking into account of the current situation of govement port
土壤是复杂的历史自然综合体，在属性空间和地理空间上都是连续渐变的，因此基于“双清晰模型”的常规土壤调查制图理论基础明显存在不足。且随着精准农业的快速发展和环境模型模
随着我国社会进程的不断加深,科学技术的发展,以及我国对于教育事业的支持,新课改的要求,现在的新型课堂已经不再是传统的教师加黑板的模式了,一个全新的技术--多媒体技术,已
These authors have made a sampling survey of professional qualifications of library directors of various types of libraries in China.The subject coverage of thi
Reflecting on twenty years of educational research,we retrieved over 400 research article on the application of artificial intelligence (AI) and deep leing (DL)
依据土壤水分动力学理论和地下滴灌土壤水分运动特征，在测定地下滴灌滴头出流特性、土壤水分运动参数、地表蒸发强度的基础上，引入作物根系吸水模型，建立了地下滴灌土壤水分运动
This paper reviews the evaluation model and measurements according to metropolitan digital library activities.Through literature review and historical research,
Blogs have permeated into our daily lives at a fast speed,and various kinds of blog spaces have attracted our attention.However,little effort has been made on s
“鲁迅美术学院特藏品档案数据库”是以本院所藏珍贵的书画、文物等艺术类实物资源为建设内容,以特色信息资源共享为主要目的而构建的馆藏特色数字化信息资源.以特色馆藏资源