國立虎尾科技大學 |

TAXONOMY, PHYSIOLOGY, AND AGRONOMIC POTENTIAL OF AZOLLA SPP. (CHINA, VIETNAM).

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	TAXONOMY, PHYSIOLOGY, AND AGRONOMIC POTENTIAL OF AZOLLA SPP. (CHINA, VIETNAM)./
Author:	LUMPKIN, THOMAS ADAM.
Description:	1 online resource (190 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 44-04, Section: B, page: 9730.
Subject:	Agronomy. -
Online resource:	click for full text (PQDT)

TAXONOMY, PHYSIOLOGY, AND AGRONOMIC POTENTIAL OF AZOLLA SPP. (CHINA, VIETNAM).
LUMPKIN, THOMAS ADAM.

TAXONOMY, PHYSIOLOGY, AND AGRONOMIC POTENTIAL OF AZOLLA SPP. (CHINA, VIETNAM). - 1 online resource (190 pages)

Source: Dissertation Abstracts International, Volume: 44-04, Section: B, page: 9730.

Thesis (Ph.D.)--University of Hawai'i at Manoa, 1983.

Includes bibliographical references

The freefloating aquatic fern Azolla pinnata has been grown for centuries in northern Vietnam and isolated areas of southeastern China as a nitrogen-fixing green manure for rice.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

Subjects--Topical Terms:

1027735
Agronomy.
Index Terms--Genre/Form:

554714
Electronic books.

TAXONOMY, PHYSIOLOGY, AND AGRONOMIC POTENTIAL OF AZOLLA SPP. (CHINA, VIETNAM).
LDR:03420ntm a2200313K 4500 001 914572
005 20180724085440.5
006 m o u
007 cr mn||||a|a||
008 190606s1983 xx obm 000 0 eng d
035 $a (MiAaPQ)AAI8319830
035 $a AAI8319830
040 $a MiAaPQ $b eng $c MiAaPQ
100 1 $a LUMPKIN, THOMAS ADAM. $3 1187868
245 1 0 $a TAXONOMY, PHYSIOLOGY, AND AGRONOMIC POTENTIAL OF AZOLLA SPP. (CHINA, VIETNAM).
264 0 $c 1983
300 $a 1 online resource (190 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 44-04, Section: B, page: 9730.
502 $a Thesis (Ph.D.)--University of Hawai'i at Manoa, 1983.
504 $a Includes bibliographical references
520 $a The freefloating aquatic fern Azolla pinnata has been grown for centuries in northern Vietnam and isolated areas of southeastern China as a nitrogen-fixing green manure for rice.
520 $a The known species of Azolla were collected from their native habitats. Morphology of Azolla caroliniana, A. filiculoides, A. mexicana, A. microphylla, A. nilotica, A. pinnata var. pinnata, A. pinnata var. imbricata, and A. rubra was studied using light and scanning-electron microscopy. An improved identification key was developed based on reproductive and vegetative tissues. Floats of the megaspores can be used for identification to the section of the genus, and the sporoderm of the megaspores and the glochidia of the massulae can be used for identification of the species. Trichomes on the leaf lobes and rhizomes, and growth patterns of crowded plants are important vegetative features for identification.
520 $a Adaptation of the known species of Azolla to a wide range of climatic conditions was evaluated by growing cultures on nitrogen-free nutrient solution at a site where air temperatures ranged from 0(DEGREES)C in the winter to 40(DEGREES)C in the summer. Relative growth rates (RGR) were calculated from increases in dry weight over growth cycles of one week to one month. The RGRs of individual species were most closely related to minimum water temperature during spring and fall (R('2) = 0.67 to 0.99); minimum water temperature and daylength for spring plus fall (R('2) = 0.73 to 0.92); and minimum water temperature, solar radiation, and relative humidity during summer (R('2) = 0.74 to 0.91).
520 $a The agronomic potential of azolla accessions and azolla management treatments were evaluated in a field experiment with spring rice conducted at Hangzhou, China. A. caroliniana, two varieties of A. filiculoides, A. pinnata var. imbricata, and A. rubra were grown as a monocrop before rice, as an intercrop with rice, and as a monocrop and intercrop. Grain yields averaged across species increased in the order: combination > monocrop > intercrop. Grain yields were correlated with accumulated N within azolla accessions across management treatments (r = 0.94 to 0.99). However, yields were poorly or negatively correlated across accessions within a management treatment (monocrop, r = -0.27; intercrop, r = 0.20; combination, 4 = -0.61).
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Agronomy. $3 1027735
655 7 $a Electronic books. $2 local $3 554714
690 $a 0285
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Hawai'i at Manoa. $3 1182035
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8319830 $z click for full text (PQDT)