Abstract
Abstract Using K‐rich plants as biological K fertilizer is an innovation in physiological ecology of plant nutrition and a possible solution to the problem of K deficiency in soils and crops in China and other developing countries. Since 1978, over 70 water plants, herbs and a few crops have been tested, of which 20 had a higher K content (>2.5% DM) than rice straw (1.67–2.5% DM). They were defined as K‐rich plants. Alligator alternanthera [Alternanthera philoxeroides (Mart.) Griseb] contains as much as 9.75% K on a dry matter basis. The results of pot cultures and field trials carried out in 1982–1984 showed that the application of dried Alligator alternanthera at the rate of 1500 kg/ha increased rice yields by 17.4% and was equally effective as or even more effective than KCl or rice straw. It should be noted that biological K fertilizers are superior to chemical ones in improving crop yield and quality because K‐rich plants not only supply crops with K but also with other nutrients and organic matter. Furthermore, biological K fertilizers can reduce pollution while chemical K fertilizers may increase pollution.
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Claims 4
Claim · model-written summary
Twenty tested plants had potassium content above 2.5% dry matter, higher than rice straw.
Verbatim
e0“over 70 water plants, herbs and a few crops have been tested, of which 20 had a higher K content (>2.5% DM) than rice straw (1.67–2.5% DM).”
Claim · model-written summary
Alligator alternanthera contained 9.75% potassium on a dry matter basis.
Verbatim
e0“Alligator alternanthera [Alternanthera philoxeroides (Mart.) Griseb] contains as much as 9.75% K on a dry matter basis.”
Claim · model-written summary
Dried Alligator alternanthera at 1500 kg/ha increased rice yield by 17.4%.
- Taxon
- rice
Oryza sativae0 - Treatment
- application of dried Alligator alternanthera at the rate of 1500 kg/hae0
- Outcome
- rice yieldse0
- Direction
- increasede0
- Value
- 17.4%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of dried Alligator alternanthera at the rate of 1500 kg/ha increased rice yields by 17.4%”
Claim · model-written summary
Dried Alligator alternanthera matched or exceeded KCl or rice straw for rice yield.
- Taxon
- riceOryza sativae1
- Treatment
- dried Alligator alternantherae1
- Outcome
- effectivee0
- Direction
- equally effective as or even more effectivee0
- Qualifier
- rice yieldse1
- Comparator
- KCl or rice strawe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was equally effective as or even more effective than KCl or rice straw.”
e1“the application of dried Alligator alternanthera at the rate of 1500 kg/ha increased rice yields by 17.4%”
The same questions in other papers
processing · yield · Oryza sativa (rice)Positive and negative results
87 papers in the same direction as this paper · 21 in the opposite direction · 5 reporting no difference from an alternative
- negative
- no effect
- negative
110 papers more in this group
See all 114 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.