Reduction of Phosphatic and Potash Fertilizer in Sweet Corn Production by Pre-transplanting Application of Potassium Phosphate to Plug Seedlings
Reduction of Phosphatic and Potash Fertilizer in Sweet Corn Production by Pre-transplanting Application of Potassium Phosphate to Plug Seedlings
复制标题
穴盘苗移栽前施磷钾肥减少甜玉米生产中磷钾肥用量
DOI：
10.1626/pps.8.608
复制
发表时间：
2005
影响因子：
2.5
通讯作者：
M. Nanzyo
中科院分区：
文献类型：
--
作者：
Kazuhiro Watanabe;T. Murayama;T. Niino;T. Nitta;M. Nanzyo
为探索甜玉米生产中的一种新的少施磷肥的施肥制度，在甜玉米穴盘苗移栽前施入磷酸钾，研究其对甜玉米生长、产量、光合活性和矿质元素吸收的影响。移栽前施KP（PTKPA）可减少甜玉米穴盘苗生长所需的磷钾肥用量。PTKPA降低磷钾肥施用量的机理为：1）PTKPA提高了植株体内磷含量，促进了根系的建立。2)提前生根不仅缩短了水分胁迫的持续时间，而且增加了氮、镁等必需营养元素的吸收。3)氮、镁含量的增加导致叶绿素含量和蛋白质含量的增加，从而激活了生长初期的光合作用。4)提高光合活性增加NAR在生长初期。5)这种NAR的增加加速了叶片的扩展，增加了LAI。6)生育前期叶面积指数越大，整个生育期叶面积指数越大，穗粒重和产量越高。
Abstract To develop a new fertilizing system with a reduced amount of phosphatic fertilizer in sweet corn production, we applied potassium phosphate to the plug seedlings before transplanting to the field, and examined its effects on growth, yield, photosynthetic activity and absorption of minerals. The amount of phosphatic and potash fertilizers necessary to grow sweet corn could be reduced by the pre-transplanting KP application (PTKPA) to the plug seedlings. We considered the mechanisms involved in the reduction of P and K application rate by PTKPA as follows; 1) PTKPA increased the P content of plant, which accelerated the root establishment. 2) The advanced root establishment not only reduced the duration of water stress, but also increased absorption of the essential nutrients such as N and Mg. 3) Higher content of N and Mg led to higher chlorophyll content and possibly protein content, which activated photosynthesis during the early growth stage. 4) Improved photosynthetic activities increased NAR during the early growth stage. 5) This increase in NAR accelerated leaf expansion, increasing LAI. 6) Larger LAI during the early growth stage led to larger LAI throughout the growing stage, resulting in a higher CGR and ear yield.
影响因子：
4.3
作者：
BJORKMAN, O;DEMMIG, B
通讯作者：
DEMMIG, B