長粒型秈稻之休眠性與脫粒性研究
Other Title
Studies on the Grain Dormancy and Shattering Habit of Long-Grain Indica Rice
Journal
中華農業研究
Journal Volume
25
Journal Issue
1
Start Page
1
End Page
6
Date Issued
1976-03-01
Date
1976-03-01
Author(s)
陳隆澤
邱建中
L.C. Chen
C.C. Chiu
Abstract
為明瞭新育成推廣之長粒型秈稻品種嘉農秈6.8.11號之種子休眠性，適當的稻種預措方法及脫粒性等以謀發揮其優越之生產潛力，減少損失，於63年二期作至64年一期作在本分所進行本試驗。結果摘錄如下：
1. 嘉農秈品種具有長短不同的短期休眠性，嘉農秈6號之休眠期最長，約為兩週左右，嘉農秈8號次之，約為7天前後，而嘉農秈11號似未具休眠性；故嘉農仙6.8號之稻種在收穫乾燥後至少須分別存放兩週或一週以上，而嘉農秈11號之稻種亦應充分乾燥後方可供下期作播種之用。
2. 稻穀收穫後，須充分乾燥至含水量在13度以下，一期作在播種前須浸種48~72小時，催芽24小時；而二期作應浸種24小時，催芽24小時，方能確保稻種之發芽車與發芽整齊度。
3. 嘉農秈三個品種均屬於較易脫粒之品種，尤以嘉農秈8號最易脫粒，嘉農秈11號次之，而以嘉農秈6號較難脫粒；又嘉農秈6.8號有隨著成熟度之增加而愈易脫粒之現象，應適時採收以減少田間損失率；但嘉農秈11號具有愈成熟愈不易脫粒特性，故其採收延誤時應無嚴重之損失。
This experiment was aimed to study the grain dormancy, seed pretreatments and
shattering habit of new-improved long grain Indica rice varieties Chianung sen 6, 8 and 11 in order to exploit their full potentiality and reduce the possible losses. The trial was conducted from the second crop of 1974 to first crop of 1975 at the Chia-yi Agricultural Experiment Station. The results are summaried as follows:
1. The dormancy period of Chianung sen varieties differed significantly. Chianung sen 6 appeared to have the longest dormant period of two weeks and Chianung sen 8 had dormant period of 7 days, while Chianung sen 11 had no appreciable period of dormancy. Hence, the grains for seed purpose should be stored for one or two weeks before seeding for Chianung sen 6 and 8. The grains of Chianung sen 11 should also be properly dried.
2. In order to obtain satisfactory and faster germination, the grains of Chianung sen varieties should be dried to the moisture content of less than 13 percent and soaked 48-72 hours with presprouting treatment of 24 hours in the first crop season. It should also be soaked 24 hours with 24 hours of presprouting in the second crop.
3. The degree of grain shattering of Chianung sen varieties was in the order of Chianung sen 8, 11 and 6, i. e. Chianung sen 6 gave greater resistance to shattering than Chianung sen 11 and 8.On the other hand, the shattering resistance of Chianung sen 6 and 8 decreased with the progress of ripening, but the opposite was true with Chianung sen 11. Thus, Chianung sen 6 and 8 must he harvested at the proper stage of maturity, while the losses from shattering may be light for Chianung sen 11 even if it is harvested over-ripe.
Publisher
農業試驗所
Type
journal article
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