Crop cultivation & physiology |
|
|
|
|
Effects of different hill spacings and seedling numbers per hill on dry matter production and yield of machine-transplanting hybrid rice |
PU Shilin, DENG Fei, HU Hui, ZHONG Xiaoyuan, WANG Li, LI Wu, LI Shuxian, LIAO Shuang, REN Wanjun* |
Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture/College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China |
|
|
Abstract In order to clarify the influence of different hill spacings and seedling numbers on dry matter accumulation and yield formation of machine-transplanting hybrid rice, two different rice varieties, F you 498 and Yixiangyou 2115 were selected as plant materials, and a randomized block experiment with three replicates was conducted to analyze the effects of field collocation pattern on tillers, dry matter production, yield and its component factors of rice. Based on the production practice, the reasonable seedling rate of hybrid rice is 0.42 million per hectare in Sichuan Province, and three field collocation patterns were set as: 1) high hills with low seedlings, 1.5 seedlings transplanted at 30 cm × 12 cm spacing; 2) middle hills with middle seedlings, 2.1 seedlings transplanted at 30 cm × 17 cm spacing; 3) low hills with high seedlings, 2.9 seedlings transplanted at 30 cm × 23 cm spacing. The results showed that the tiller numbers of single hill and population increased first and then decreased with the rice development process. The tiller number of single hill in every development period improved as the hill spacing increased, and the earring- tiller percentage of Yixiangyou 2115 was higher in low hills with high seedlings. The leaf area of single hill and dry matter mass of rice increased as the spacing enlarged, and Yixiangyou 2115 had larger leaf area and dry matter mass of single hill in low hills with high seedlings. Under the three different field collocation patterns, the differences of tiller numbers, dry matter accumulation and transportation, and yield were not significant, which indicated that the decrease of hill numbers per unit area did not influence the productive ear numbers and yield with the same basic seedlings. Reduce hills but not reduce seedlings, and low hills with high seedlings can also achieve high and stable yield.
|
Received: 07 August 2017
Published: 16 October 2017
|
|
Corresponding Authors:
rwjun@126.com
E-mail: rwjun@126.com
|
|
Cite this article:
PU Shilin, DENG Fei, HU Hui, ZHONG Xiaoyuan, WANG Li, LI Wu, LI Shuxian, LIAO Shuang, REN Wanjun. Effects of different hill spacings and seedling numbers per hill on dry matter production and yield of machine-transplanting hybrid rice. Journal of Zhejiang University (Agriculture and Life Sciences), 2018, 44(1): 21-30.
URL:
http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2017.08.071 OR http://www.zjujournals.com/agr/Y2018/V44/I1/21
|
杂交稻不同机插穴距及苗数配置对干物质生产与产量的影响
为明确杂交稻机插不同穴距及苗数配置对干物质积累与产量形成的影响,选用2个不同株型的杂交籼稻品种,采用生产上广泛应用的基本苗42万苗/hm2,固定行距为30 cm,设置穴距为12、17、23 cm,每穴内苗数为1.5、2.1、2.9苗,比较分析田间配置对水稻分蘖、干物质生产、产量及其构成因素的影响。结果表明:水稻单穴茎蘖数和群体茎蘖数随生育进程呈现先增加后减少的趋势,各生育时期单穴茎蘖数均随穴距的增大而增加,宜香优2115的分蘖成穗率在低穴高苗配置下最高;在不同田间配置下水稻单穴叶面积和干物质量均随穴距的增大而增加,宜香优2115在低穴高苗配置下具有较大的单穴叶面积和单穴干物质量;3种田间配置下的群体茎蘖数、干物质积累与转运、产量差异不显著,说明基本苗一致,单位面积穴数减少并不会影响最终有效穗的数量进而影响产量,减穴不减苗,低穴高苗也可以取得高产、稳产。
关键词:
田间配置,
穴距,
穴苗数,
机插,
水稻,
干物质积累,
产量
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|