Abstract
The dry matter production of a ladino clover sward was investigated and some analysis of its growth were made during both periods of late spring to summer and of atumn to early winter. The work was carried out at Tohoku University farm (volcanic ash soil) located in northern Japan. Pure stands of ladino clover, two years after sowing were clipped up to 7 cm above the ground level on the 14th of June and 4th of October. Starting on these dates, plants were harvested with intervals of 5 to 10 days with randomly sited quadrat of 20×20 cm over a period of 6 to 7 weeks. The plants in each quadrat were separted into the root, stolon, leaf petiole and leaf lamina. Dry weight of each part and area were measured. The dry weight of leaves was higher in June than in October, wheras that of stolon and root was higher in October than in June. Dry weight of total plant was nearly the same in June and in October (fig. 1). Stolon and root dry weight decreased more sharply and for longer duration in June than in October. It was thought that the sharp decrease of weight of these storage organs in June was associated with the fast development of LAI or leaf weight (fig. 2). The growth process after defoliation was separated into two stages, namely (1) the stage in which root and stolon weights decrease and the fast development of new leaves occurs, and (2) the stage in which root and stolon weights increse and slow developmant of leaves occurs. The amount of net prduction was 8.4 g, m-2, day-1 in June and 4.9 g, m-2, day-1 in October. From these values, length of growing period and actual production of fresh weight, it was estimated that net production of the ladino clover sward in moderate productivity was about 1.2 kg, m-2, year-1 and was about 1.8 kg, m-2, year-1 in high productivity in Japan. LAI reached a maximum value of 3.15 in June and 3.36 in October. It was noticed that LAI increased faster and reached the maximum value in a shorter period in June than in October (table 1). The value of leaf area duration was nearly the same in June and in October, whereas the value of NAR was higher in June than in October for most (o the Period of regrowth. It was thought that the low value of NAR was one of the cause of low production in October and that some effect of frost on. Leaves had relation to the decrease of NAR (table 2). A comparison of net production per day, NAR and LAI suggested that this clover was inferior to sweet potato and rice plant in dry matter production.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 19
Claim · model-written summary
Leaf dry weight was higher in June than October.
Verbatim
t0“Ladino Clover”
e0“The dry weight of leaves was higher in June than in October”
Claim · model-written summary
Stolon dry weight was higher in October than June.
Verbatim
t0“Ladino Clover”
e0“that of stolon and root was higher in October than in June”
Claim · model-written summary
Root dry weight was higher in October than June.
Verbatim
t0“Ladino Clover”
e0“that of stolon and root was higher in October than in June”
Claim · model-written summary
Total plant dry weight was nearly equal in June and October.
Verbatim
t0“Ladino Clover”
e0“Dry weight of total plant was nearly the same in June and in October”
Claim · model-written summary
Stolon and root dry weights fell more sharply and longer in June than October.
Verbatim
t0“Ladino Clover”
e0“Stolon and root dry weight decreased more sharply and for longer duration in June than in October.”
Claim · model-written summary
The June loss of storage-organ weight was linked to rapid leaf development.
Verbatim
t0“Ladino Clover”
e0“the sharp decrease of weight of these storage organs in June was associated with the fast development of LAI or leaf weight”
Claim · model-written summary
After defoliation, root and stolon weight first declined as new leaves developed rapidly.
- Taxon
- Ladino Clovert0
- Organ / stage
- root and stolone0
- Outcome
- root and stolon weightse0
- Direction
- decreasee0
Not reportedTreatment
Verbatim
t0“Ladino Clover”
e0“the stage in which root and stolon weights decrease and the fast development of new leaves occurs”
Claim · model-written summary
Later in regrowth root and stolon weight increased as leaf development slowed.
Verbatim
t0“Ladino Clover”
e0“the stage in which root and stolon weights increse and slow developmant of leaves occurs”
Claim · model-written summary
Daily net production was 8.4 g, m-2, day-1 in June.
Not reportedDirection
Verbatim
t0“Ladino Clover”
e0“The amount of net prduction was 8.4 g, m-2, day-1 in June”
Claim · model-written summary
Daily net production was 4.9 g, m-2, day-1 in October.
Not reportedOutcomeDirection
Verbatim
t0“Ladino Clover”
e0“4.9 g, m-2, day-1 in October”
Claim · model-written summary
Estimated annual net production was about 1.2 kg, m-2, year-1 at moderate productivity in Japan.
- Taxon
- Ladino Clovert0
- Outcome
- net productione0
- Value
- 1.2 kg, m-2, year-1e0
- Qualifier
- moderate productivitye0
Not reportedDirection
Verbatim
t0“Ladino Clover”
e0“net production of the ladino clover sward in moderate productivity was about 1.2 kg, m-2, year-1”
Claim · model-written summary
Estimated annual net production was about 1.8 kg, m-2, year-1 at high productivity in Japan.
Not reportedDirection
Verbatim
t0“Ladino Clover”
e0“was about 1.8 kg, m-2, year-1 in high productivity in Japan”
Claim · model-written summary
LAI reached 3.15 in June.
Verbatim
t0“Ladino Clover”
e0“LAI reached a maximum value of 3.15 in June”
Claim · model-written summary
LAI reached 3.36 in October.
Not reportedDirection
Verbatim
t0“Ladino Clover”
e0“3.36 in October”
Claim · model-written summary
LAI rose faster and peaked sooner in June than October.
Verbatim
t0“Ladino Clover”
e0“LAI increased faster and reached the maximum value in a shorter period in June than in October”
Claim · model-written summary
Leaf area duration was nearly equal in June and October.
Verbatim
t0“Ladino Clover”
e0“The value of leaf area duration was nearly the same in June and in October”
Claim · model-written summary
NAR was higher in June than October for most regrowth.
Verbatim
t0“Ladino Clover”
e0“the value of NAR was higher in June than in October for most (o the Period of regrowth”
Claim · model-written summary
Low NAR and frost effects on leaves were proposed as causes of low October production.
Verbatim
t0“Ladino Clover”
e0“the low value of NAR was one of the cause of low production in October and that some effect of frost on. Leaves had relation to the decrease of NAR”
Claim · model-written summary
Clover was judged inferior to sweet potato and rice for dry matter production.
Verbatim
t0“Ladino Clover”
e0“this clover was inferior to sweet potato and rice plant in dry matter production”