|Table of Contents|

EFFECTOF NITROGEN FERTILIZER ON THE ACCUMULATION AND DISTRIBUTIONOF DRY MATTER IN RELAY-PLANTING SOYBEAN(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2006年04期
Page:
404-409
Research Field:
Publishing date:

Info

Title:
EFFECTOF NITROGEN FERTILIZER ON THE ACCUMULATION AND DISTRIBUTIONOF DRY MATTER IN RELAY-PLANTING SOYBEAN
Author(s):
Zhang Hanbin 　Wu Xiaoyan　Yang Wenyu
(College of Agronomy , Sichuan Agricultural University , Ya’an 625014)
Keywords:
Nitrogen application amount ; Relay-planting soybean; Dry matter ; Yield; Correlation coeffi-cient
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2006.04.0404
Abstract:
　In the wheat / maize/ soybean relay-cropping pattern, the accumulation and distribution of drymatter were studied at different levels of nitrogen fertilizer (0, 45, 90,135,180,225 kg /hm?2?). The resultsshowed that the leaf area index (LAI) of soybean was improved and leaf senescence was deferred by in-creasing of nitrogen levels , nitrogen treatments kept the high LAI of soybean at the growth stage of R 4 ,which was favorable for the dry matter accumulation. Appropriate nitrogen levels (≤135 kg /hm2 )harmo-nized the dry matter outputting ratio (OR)to every organ of soybean after pudding , and increased yield ofrelay-planting soybean. The high level of nitrogen (180, 225 N kg /hm2 ) accumulate more dry matter be- fore maturation, which led to the unharmonious correlation between the storeroom and source , declinedthe OR of dry matter , lowed the soybean yield. As different organ was concerned, contribution ratio (CR)of leaf was more than that of stem. There was correlation between dry matters accumulation and yieldcomponents , dry matter of root and stem had a significant positive correlation with seed filling and yield atseedling growth stage of relay-planting soybean , but dry leaf weight had a negative correlated with theyield components at the later grow th stage. In a word, appropriate nitrogen levels (45～ 90 kg /hm 2 )im-proved CR of dry matter and decreased vacant seed, which was effective for achieving harvest.

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Last Update: 2016-12-16