免耕条件下川香优9838氮磷钾吸收规律与氮肥合理施用(英文)

来源 :Agricultural Science & Technology | 被引量 : 0次 | 上传用户:milo_pine
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The aim of the study is to investigate the absorption laws of nitrogen,phosphorus,and potassium,and proper nitrogen application in Chuanxiangyou 9838 under no-tillage cultivation. Five nitrogen application treatments were designed to analyze the absorption laws of N,P and K,and to discuss the effects of different N fertilizer application amounts on yield and yield composition factors of Chuanxiangyou 9838. The results showed that gross nutrient absorption in Chuanxiangyou 9838 was greatly varied at different developmental stages under rice-rape rotation with no-tillage. The maximum N absorption in Chuanxiangyou 9838 appeared at jointing stage followed by heading stage,thirdly the tillering stage; the P absorption in Chuanxiangyou 9838 presented the consecutively slight increase during seedling stage and mature stage; the K absorption in Chuanxiangyou 9838 was mainly conducted from jointing stage to heading stage,during which K absorption accounts for 73.4% of the total absorption in whole developmental stage. Consequently,N fertilizer should be applied earlier (before jointing stage),P fertilizer is suitable as base fertilizer and application of K fertilizer should be preferably conducted at early-middle period. When the yield reached 11 t/hm2,the optimal N application amount in Chuanxiangyou 9838 was about 165 kg/hm2. The aim of the study is to investigate the absorption laws of nitrogen, phosphorus, and potassium, and proper nitrogen application in Chuanxiangyou 9838 under no-tillage cultivation. Five nitrogen application treatments were designed to analyze the absorption laws of N, P and K, and to discuss the effects of different N fertilizer application on yield and yield composition factors of Chuanxiangyou 9838. The results showed that gross nutrient absorption in Chuanxiangyou 9838 was greatly varied at different developmental stages under rice-rape rotation with no-tillage. The maximum N absorption in Chuanxiangyou 9838 appeared at jointing stage followed by heading stage, thirdly the tillering stage; the P absorption in Chuanxiangyou 9838 presented the consecutively slight increase during seedling stage and mature stage; the K absorption in Chuanxiangyou 9838 was mainly conducted from jointing stage to heading stage, during which K absorption accounts for 73.4% of the total absorption in wh ole developmental stage. Consequently, N fertilizer should be applied earlier (before jointing stage), P fertilizer is suitable as base fertilizer and application of K fertilizer should be preferably conducted at early-middle period. When the yield reached 11 t / hm2, the optimal N application amount in Chuanxiangyou 9838 was about 165 kg / hm2.
其他文献
农村财务管理工作关系到农民的切身利益,更是维护农村社会稳定的基石.“村财乡代管”模式有利于解决村级财务混乱,是规范农村财务管理的有效手段.D县实施“村财乡代管”模式
随着素质教育的不断发展,小学语文的写作教学要求也在不断提高.在当前小学语文教学中,写作是教学内容的重要组成部分,其教学模式直接决定教学水平的高低.本文通过对小学语文
实行厂长负责制后,企业党组织从过去对企业实行统一领导,转为起保证监督作用.这是一个重大的转变.新形势对企业党委提出了什么新的要求,怎样才能更好地发挥保证监督作用呢?
随着国企混改的进一步发展,政府部门也开始加大供给侧改革力度.在国企深化改革阶段,提高财务内部控制水平是当前国有房地产企业的一项重要改革任务.财务内部控制能力的强弱也
数学思想方法,是对数学知识发生过程的提炼、抽象、概括和升华,是对数学规律的理性认识,是数学教学的灵魂.数学学习,除了获得基本的知识技能,最重要的就是感悟数学中蕴含的基
近年,国内的制造业规模逐步扩大,制造公司数量也在逐渐增多,给制造行业内部带来了较大的竞争.制造产品的利润空间被压缩,公司就要通过转变现有经营模式,增强对产品生产成本的
小学生本身喜欢奇思妙想,在教学过程中,教师应努力发展学生爱思考的能力,通过营造质疑环境、创设教学情境等手段,引导学生提出自己的问题,因为思维创新对于学生成长非常重要.
内蒙古自治区赤峰市有一张《红山晚报》,2009年6月2日该报“文化副刊”刊载有《不该叫错的“三个称呼”》一文,文中说:“乃父、乃师——不是他的父亲、他的老师;而是你的。”
人工智能的高速发展,推动了财务机器人、“互联网+”“云会计”、大数据的广泛应用,大大提高了会计核算的效率和质量,改变了会计原来的工作方式,传统的财务会计已经满足不了
现阶段,国有资产在行政事业单位占很大比例,但是部分行政事业单位在国有资产核算管理方面却存在很多问题,因管理不善导致行政事业单位发展缓慢的情况比比皆是.有些行政事业单