|Table of Contents|

Characteristics of Stem between Sole-cropping and Relay-cropping Soybean under Different Nitrogen Applied Levels(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2011年01期
Page:
101-104
Research Field:
Publishing date:

Info

Title:
Characteristics of Stem between Sole-cropping and Relay-cropping Soybean under Different Nitrogen Applied Levels
Author(s):
CHEN Xiao-lin; YANG Wen-yu; CHEN Zhong-qun;  WANG Jing-jing
College of Agronomy，Sichuan Agricultural University，Ya’an 625014， Sichuan， China
Keywords:
Relay-cropping;  Sole-cropping;  Nitrogen level;  Characteristics
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2011.01.0101
Abstract:
Soybean is prone to lodging and overgrowth in the “maize/soybean” relay-cropping pattern. The characteristics of soybean stem is studied by creating high nitrogen and shaded environment using different nitrogen levels (0、40、60、80、120 and 160 kg·ha-1) and intercropping conditions, which is relatively easy to result in overgrowth and lodging. The results indicated that the stem height of relay-cropping soybean (RCS) was significantly higher than that of sole-cropping soybean (SCS), but no significant differences between the stem diameter and the main stem node number were observed. Whether SCS or RCS, in the direction of morphology, the length of nodosity stem showed as “down-up-down”, the longest nodosity stem of RCS appeard in the 9th section, which was two sections lower than that of the SCS. Compared with the SCS, the largest increase of nodosity stem of RCS appears at the 7th section, as 2.2 cm (F=240.56, P=0.0001), the increase extent reaches up to 61.24%. With gradually increase of nitrogen levels, the nodosity stem showed as “down-up-down”, and no changes were found at the positions of longest nodosity stem. It indicated that the reason why RCS was easier to lodge than SCS was that length of nodosity stem increased significantly and the longest nodosity stem moved downward. Although N is a factor to influence soybean nodosity stem, the reason for the change of the longest nodosity stem positions was in the “maize/soybean” relay-cropping pattern. The best time to control the overgrowth and stem lodging of RCS was before the 7th nade period.

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Last Update: 2014-09-11