Abstract
In orber to increase the yield of crops in the cooler region of Japan (Tohoku), it is important to accelerate the early growth. The purpose of the present study is to find out how to accelerate the growth of the upland rice plants. The relationships between the kind and amount of fertilizer and early growth were studied in the controlled climatic chambers (about 16.5°C). On the other hand, the effect of soil moisture on the growth was observed in a glass room. The results are summarized as follows: 1. The influence of the amount of fertilizer upon the early growth of upland rice plants being at the about third leaf stage was obviously recongnized. That is, the absorption of nutrients and the growth of plants increased in proportion to the amount of fertilizer (the maximum in this experiment was 2.0 g N, 4.0 g P2O5 and 2.0 g K2O per 1/5000 a pot). 2. The degrees of acceleration of the early growth was maximal from nitrogen and decreased in the order phosphorus, pottasium, among the three elements of fertilizers. 3. In the case of the soil moisture content over 50 % of the maximum water holding capacity (120 % of dried soil), germination, growth and absorption of nutrients were scarecely affected by the soil moisture. But these decreased in proportion to soil moisture below 50%. Moreover, the effect of fertilizer was obviously observed in the former. But in the latter case, both germination and growth tend to be fallen with the increase of fertilizer.
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Claims 6
Claim · model-written summary
Nutrient absorption increased with fertilizer amount.
- Taxon
- upland rice plants
Oryza sativat0 - Treatment
- amount of fertilizere0
- Outcome
- absorption of nutrientse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the absorption of nutrients and the growth of plants increased in proportion to the amount of fertilizer”
t0“upland rice plants”
Claim · model-written summary
Early plant growth increased with fertilizer amount.
- Taxon
- upland rice plantsOryza sativat0
- Treatment
- amount of fertilizere0
- Outcome
- growth of plantse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the absorption of nutrients and the growth of plants increased in proportion to the amount of fertilizer”
t0“upland rice plants”
Claim · model-written summary
Nitrogen produced the greatest acceleration of early growth, followed by phosphorus and potassium.
- Taxon
- upland rice plantsOryza sativat0
- Treatment
- nitrogene0
- Outcome
- early growthe0
- Direction
- maximale0
- Comparator
- phosphorus, pottasiume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The degrees of acceleration of the early growth was maximal from nitrogen and decreased in the order phosphorus, pottasium”
t0“upland rice plants”
Claim · model-written summary
Above 50% water holding capacity, germination, growth and nutrient absorption were scarcely affected by moisture.
- Taxon
- upland rice plantsOryza sativat0
- Treatment
- soil moisturee0
- Outcome
- germination, growth and absorption of nutrientse0
- Direction
- scarecely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination, growth and absorption of nutrients were scarecely affected by the soil moisture”
t0“upland rice plants”
Claim · model-written summary
Germination, growth and nutrient absorption decreased below 50% soil moisture.
- Taxon
- upland rice plantsOryza sativat0
- Treatment
- soil moisture below 50%e0
- Outcome
- thesee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But these decreased in proportion to soil moisture below 50%.”
t0“upland rice plants”
Claim · model-written summary
At low soil moisture, increasing fertilizer tended to reduce germination and growth.
- Taxon
- upland rice plantsOryza sativat0
- Treatment
- increase of fertilizere0
- Outcome
- germination and growthe0
- Direction
- fallene0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both germination and growth tend to be fallen with the increase of fertilizer.”
t0“upland rice plants”
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