|Table of Contents|

Effects of Planting Density and Nitrogen Topdressing on Agronomic Traits and Yield of Nongqingdou 28(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2022年06期
Page:
688-695
Research Field:
Publishing date:

Info

Title:
Effects of Planting Density and Nitrogen Topdressing on Agronomic Traits and Yield of Nongqingdou 28
Author(s):
ZHOU Chang-jun;  TIAN Zhong-yan;  WU Yao-kun;  YU Ji-dong; LIU Bing;  LI Jian-ying;  MA Lan;  LI Xiao-bai
（Daqing Branch，Heilongjiang Academy of Agricultural Sciences/Daqing Experiment Station of National Soybean Industrial Technology System， Daqing 163316，China）
Keywords:
soybean;  groups;  planting density;  nitrogen topdressing;  yield
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2022.06.0688
Abstract:
In order to explore the best planting density and nitrogen topdressing level of a new soybean cyst nematode resistant cultivar Nongqingdou 28 in the saline alkali semi-arid area of Western Heilongjiang Province， we set up a two factor random block design of six nitrogen topdressing treatments and four planting density treatments (220 thousand， 250 thousand， 280 thousand and 310 thousand plants·ha-1). The effects of different planting density and nitrogen topdressing level on its main agronomic traits and yield， and the optimal group structure of Nongqingdou 28 were studied. The results showed that under the same nitrogen topdressing level， the plant height and bottom pod height increased with the increasing of planting density， while the number of branches， effective nodes， pods per plant and seeds per plant, and seed weight per plant decreased with the increasing of planting density. At the same planting density， the number of pods per plant showed bimodal high value at the nitrogen topdressing level of 30 and 120 kg·ha-1， and the number and weight of seeds per plant were the highest at the nitrogen topdressing level of 120 kg·ha-1， and then decreased. The yield increased firstly and then decreased with the increasing of planting density and nitrogen topdressing level， and the relevant yield components of the highest yield treatment (A4B3) were not prominent. It can be seen that the optimal allocation of fertilizer and density maximized the group advantage. When the planting density was 280 thousand plants·ha-1 and the top application of nitrogen fertilizer was 120 kg·ha-1， the yield of Nongqingdou 28 was the highest， reaching 2 830.50 kg·ha-1， and its output value increased by 3 792.22 yuan·ha-1 compared with the control (A0B1). Therefore， in the saline alkali soil in the west of Heilongjiang Province， the best allocation of fertilizer and density to increase production and efficiency of Nongqingdou 28 is 280 thousand plants·ha-1， 450 kg·ha-1 special compound fertilizer for soybean as base fertilizer， and topdressing urea 120 kg·ha-1.

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Last Update: 2022-11-29