JP2516330B2 - How to promote rice seed germination - Google Patents
How to promote rice seed germinationInfo
- Publication number
- JP2516330B2 JP2516330B2 JP60004965A JP496585A JP2516330B2 JP 2516330 B2 JP2516330 B2 JP 2516330B2 JP 60004965 A JP60004965 A JP 60004965A JP 496585 A JP496585 A JP 496585A JP 2516330 B2 JP2516330 B2 JP 2516330B2
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- seeds
- peroxide
- dressing
- days
- water
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、水稲種子の発芽を促進する方法に関するも
のである。TECHNICAL FIELD The present invention relates to a method for promoting germination of paddy rice seeds.
わが国の主要作物である米の栽培方法は、従来もっぱ
ら田植方式によっていた。近年になって、省力化および
増収を目的とする湛水土壌中直播方式による栽培が普及
されている。Traditionally, rice cultivation, which is a major crop in Japan, has been dominated by rice planting. In recent years, cultivation by the direct sowing method in submerged soil has been popularized for the purpose of labor saving and increase in yield.
この栽培方式では、単なる湛水直播と異なり、湛水さ
れている土壌中に、水稲種子を播種深度1〜2cmに播種
するために、田植方式の利点である適切な挿苗深度と同
じ効果を得ることができる。したがって、覆土しない湛
水直播栽培で見られる浮苗、苗転び、あるいは収穫前の
台風による倒伏などの欠点を回避することができる。ま
た、移植方式でみられる苗に対する物理的な力による影
響が皆無であり、適切な生育管理によって分けつ数の増
加にともなう増収を期待することもできる。しかしなが
ら、この湛水土壌中直播栽培方式には、播種された種子
が発芽する際に必要とする酸素の供給が不十分なため
に、発芽率の低下、苗立ち率の低下などの障害の生ずる
欠点がある。In this cultivation method, unlike direct flooding, inoculation of paddy rice seeds in a submerged soil at a seeding depth of 1 to 2 cm provides the same effect as the appropriate inoculation depth, which is an advantage of the rice planting method. be able to. Therefore, it is possible to avoid defects such as floating seedlings, falling seedlings, or lodging due to a typhoon before harvesting, which are observed in submerged direct seeding cultivation without covering with soil. In addition, since there is no effect of physical force on the seedlings seen in the transplant method, it is possible to expect an increase in the yield as the number of seeds is increased by proper growth management. However, this direct sowing method in submerged soil causes problems such as a lower germination rate and a lower seedling establishment rate because the oxygen supply required for the sown seeds to germinate is insufficient. There are drawbacks.
この発芽率の低下を防止し、さらには発芽を促進させ
る方法として、特公昭47-28751、特公昭53-46726、特公
昭55-22045号公報などに、過酸化カルシウムを、種子に
粉衣処理して酸素を供給することが記載されている。As a method for preventing this decrease in germination rate and further promoting germination, Japanese Patent Publication Nos. 47-28751, 53-46726, 55-22045 and the like disclose calcium peroxide on seeds by dressing. To supply oxygen.
このように種子に粉衣処理した場合でも、とくに平均
気温が低い時期に播種する地帯では、播種から出芽まで
の日数が長くなるので、過酸化カルシウムの粉衣は比較
的速やかに分解してしまい、継続的に酸素を供給する点
での困難性を有する。また、この点を補うために使用量
を増量して、種子周辺への酸素供給を継続させようとす
ると、過酸化カルシウムの分解過程で生成する、水酸化
カルシウムによる水稲への薬害が発生する。Even when the seeds are dressed in this way, the number of days from seeding to emergence is long, especially in the zone where seeds are sown when the average temperature is low, so the calcium peroxide dressing decomposes relatively quickly. , Has difficulty in supplying oxygen continuously. In addition, if the amount used is increased to make up for this point and the oxygen supply to the periphery of the seeds is attempted to continue, phytotoxicity to the paddy rice due to calcium hydroxide generated in the decomposition process of calcium peroxide occurs.
本発明者は、これらの公知方法も含めて、各種の検討
を行った結果、有効成分として過酸化マグネシウムを使
用し、補助成分として焼石膏などの粉衣を容易にするた
めの無機固着剤を用いて水稲種子を粉衣することによ
り、発芽の早期化および著しい出芽率の向上が得られる
ことを見出し、本発明を完成するに至った。The present inventor, including these known methods, as a result of various investigations, using magnesium peroxide as an active ingredient, an inorganic fixing agent for facilitating dressing such as calcined gypsum as an auxiliary ingredient. The present invention has been completed, and it was found that the germination can be accelerated and the emergence rate can be significantly improved by dressing paddy rice seeds with the seeds.
ここにいう固着剤としては、粉衣を容易にしかも確実
に使用するものであって、結晶水を有する化合物が使用
される。これらの化合物としては、例えば硫酸カルシウ
ムの無水塩、1/2水塩、硫酸マグネシウムの無水塩、
一、二、四、五、六、七水塩等の無機化合物をあげるこ
とができる。As the fixing agent here, a powder coating is used easily and surely, and a compound having water of crystallization is used. As these compounds, for example, anhydrous salts of calcium sulfate, 1/2 hydrate, anhydrous salts of magnesium sulfate,
Inorganic compounds such as 1, 2, 4, 5, 6, 6 and 7 hydrates may be mentioned.
固着剤に有機化合物、例えば水溶性ポリマーを使用す
ると、粉衣工程が無機固着剤のように簡便では済まなく
なり、さらに粉衣もみの保存性も悪化するという欠点を
有する。When an organic compound such as a water-soluble polymer is used as the adhesive agent, the dressing process is not as simple as the inorganic adhesive agent, and the storability of the dressed rice is deteriorated.
本発明の第1の特徴は、種子が発芽のために酸素を必
要とする期間が長期化した場合でも、粉衣が継続的に酸
素を供給することができるようにした、ということにあ
る。A first feature of the present invention is that the dressing can continuously supply oxygen even when the period in which the seed needs oxygen for germination is prolonged.
本発明による過酸化マグネシウムで粉衣された水稲種
子は、粉衣部分の過酸化マグネシウムが田水中で徐々に
分解して酸素を発生するが、その分解速度は、先行技術
の過酸化カルシウムのそれと比較して遅く、約2/3程度
である。The paddy rice seeds dressed with magnesium peroxide according to the present invention, the magnesium peroxide in the dressing part is gradually decomposed in the paddy water to generate oxygen, and the decomposition rate is the same as that of the prior art calcium peroxide. It's about 2/3 slower than the comparison.
このことにより、特に平均気温が低い時期に播種する
地帯では、播種から出芽までの日数が長くなるので、こ
の期間中徐々に分解して酸素を種子周辺に供給し続ける
ことのできる、過酸化マグネシウムの粉衣の方が、比較
的速やかに分解する過酸化マグネシウムの粉衣よりはる
かに有利である。As a result, the number of days from sowing to germination becomes longer, especially in the zone where seeds are sown when the average temperature is low, so magnesium peroxide can be gradually decomposed during this period and oxygen can be continuously supplied to the periphery of the seeds. This is far more advantageous than that of magnesium peroxide, which decomposes relatively quickly.
実際の農業経営上、湛水土壌中直播栽培を行なうにあ
たっての播種時期は、地域や後作などの各種の要因によ
って決定されるが、通常温暖地の九州、中四国地域で5
月下旬〜6月下旬、関東地域で5月中旬、東北・北海道
地域で5月上旬〜中旬である。この播種時期の平均気温
は、九州地域で約23〜25℃、関東地域で約20℃前後、東
北地域以北で約15℃前後と、大幅に変動している。In actual agricultural management, the sowing time for direct sowing in submerged soil is determined by various factors such as the region and subsequent crops, but it is usually 5 in Kyushu and Chushikoku regions, which are temperate regions.
It is from late May to late June, mid May in the Kanto region, and early to mid May in the Tohoku / Hokkaido regions. The average temperature at this sowing time fluctuates significantly, about 23-25 ℃ in Kyushu area, about 20 ℃ in Kanto area, and about 15 ℃ in the north of Tohoku area.
湛水土壌中直播栽培での水稲種子の出芽までの日数は
品種によっても若干異なるが、大体下記の式で求めら
れる。出芽までの日数x日は、 x日=50÷(平均気温−10) 平均気温が20℃前後の地域では約5日後、平均気温が
15℃前後であれば、約10日後に出芽してくることにな
り、平均気温の低下によって、出芽までの日数が長くな
ることが知られている。The number of days until emergence of paddy rice seeds in direct sowing cultivation in flooded soil varies slightly depending on the variety, but it is generally calculated by the following formula. The number of days until emergence x days is: x days = 50 ÷ (average temperature -10) In an area where the average temperature is around 20 ° C, after about 5 days, the average temperature is
It is known that if the temperature is around 15 ° C, it will start to sprout after about 10 days, and the number of days until sprout will increase due to the decrease in average temperature.
本発明の第2の特徴は、水稲に対する粉衣の薬害を軽
減したことにある。The second feature of the present invention is that the phytotoxicity of the dressing on rice is reduced.
水稲種子に粉衣された過酸化マグネシウム、過酸化カ
ルシウムの両者とも、田水中で分解して酸素を発生する
が、この分解の過程でそれぞれ、水酸化マグネシウム、
水酸化カルシウムを生成し、これらが種子周辺に分布さ
れることとなる。Both magnesium peroxide and calcium peroxide coated on paddy rice seeds decompose in field water to generate oxygen, and in the process of decomposition, magnesium hydroxide,
Calcium hydroxide is produced and these are distributed around the seed.
水酸化カルシウムの水に対する飽和条件下でのpH値は
12.5であり、強いアルカリ性を示すが、水酸化マグネシ
ウムは同じ水飽和条件下でpH値10.5を示す。実際の圃場
条件下では環境中の酸性物質によって中和され、強いア
ルカリ性が多少緩和されると考えられるが、それでも、
生成する水酸化物が種子に与える悪影響は、過酸化マグ
ネシウムではかなり軽減される。この利点は、寒冷地に
おいて酸素の供給可能期間を延長させるために、過酸化
カルシウムを増量させる手段がとり得ない、という場面
で効果を発揮するものである。The pH value of calcium hydroxide under saturated conditions for water is
12.5, which shows strong alkalinity, magnesium hydroxide exhibits a pH value of 10.5 under the same water saturation conditions. Under actual field conditions, it is thought that neutralization by acidic substances in the environment will alleviate strong alkalinity, but
The adverse effect of the generated hydroxide on the seeds is considerably reduced with magnesium peroxide. This advantage is effective in a situation where a means for increasing the amount of calcium peroxide cannot be taken in order to extend the period during which oxygen can be supplied in cold regions.
本発明を実施するには、通常有効成分として20〜30%
の過酸化マグネシウムを含有する粉衣製剤1重量部を、
1重量部の水稲種子に粉衣するのが好適である。必要に
応じて増量することも可能であり、その場合でも生成す
る水酸化マグネシウム増加による、水稲に対する薬害の
おそれは無い。In order to carry out the present invention, it is usually 20 to 30% as an active ingredient.
1 part by weight of a powder coating preparation containing magnesium peroxide of
It is preferable to coat 1 part by weight of rice seeds. It is possible to increase the amount as needed, and even in that case, there is no risk of chemical damage to paddy rice due to the increase in magnesium hydroxide produced.
粉衣方法は、過酸化マグネシウムと、固着剤として焼
石膏を含む粉衣用製剤を、回転盤上で回転させた水稲種
子に対して、適量の水とともに加える、という一般的な
方法を適宜採用することができる。As for the dressing method, a general method of adding magnesium peroxide and a dressing preparation containing calcined gypsum as a fixing agent to a paddy rice seed rotated on a turntable together with an appropriate amount of water is appropriately adopted. can do.
さらに、粉衣にあたって、必要に応じて肥料、病害虫
防除剤、植物生長調節剤などを添加すること、および過
酸化マグネシウムに対して過酸化カルシウムを任意の比
率で混合することもできる。Furthermore, in dressing, a fertilizer, a pest control agent, a plant growth regulator, etc. may be added, if necessary, and calcium peroxide may be mixed with magnesium peroxide in an arbitrary ratio.
以下に実施例をあげて、本発明をさらに具体的に示
す。Hereinafter, the present invention will be described more specifically with reference to Examples.
試験例1 1容のビーカーに、水田土壌を詰め、湛水深が3cm
になるように水を入れた。Test Example 1 A 1-volume beaker was filled with paddy soil, and the water depth was 3 cm.
Water was added so that
ついで、分解により発生する酸素量が同じになるよう
に、有効酸素濃度を同一とした過酸化カルシウム、過酸
化マグネシウムの粉衣用製剤を調製した。すなわち、過
酸化マグネシウム28%、過酸化カルシウム35%をそれぞ
れ含有し、かつ両者とも、粉衣のための固着剤として焼
石膏25%を含み、残余を炭酸カルシウムで調整して製剤
の各1重量部を、水稲種子1重量部に、水を加えながら
攪拌して粉衣処理した。Then, a powdered preparation of calcium peroxide and magnesium peroxide having the same effective oxygen concentration was prepared so that the amount of oxygen generated by decomposition would be the same. That is, each contains 28% of magnesium peroxide and 35% of calcium peroxide, and both contain 25% of calcined gypsum as a fixing agent for dressing, and the balance is adjusted with calcium carbonate to prepare 1 weight each of the preparation. 1 part by weight of paddy rice seed was stirred while adding water, and powdered.
この粉衣した水稲種子を、上記のビーカーの土壌表面
から、1cmの深さに各20粒づつ埋没し、20℃の恒温器内
に静置した。From the soil surface of the beaker, 20 seeds of each of the powdered rice seeds were buried at a depth of 1 cm, and left in a thermostat at 20 ° C.
恒温器に移してから、3日、7日、14日後と経時的に
ピンセットで粉衣種子を土壌中からとり出し、粉衣部分
を種子から注意深くはがし、その部分に残存する過酸化
マグネシウム及び過酸化カルシウムを、それぞれ過マン
ガン酸カリウムで滴定する方法で分析し、分解率を求め
た。Remove the powdered seeds from the soil with tweezers over 3 days, 7 days, and 14 days after transfer to the incubator, carefully peel off the powdered seeds from the seeds, and remove the magnesium peroxide and excess peroxide remaining in the area. Calcium oxide was analyzed by the method of titrating with potassium permanganate to determine the decomposition rate.
その結果を第1表に示す。 The results are shown in Table 1.
第1表から明らかなとおり、過酸化マグネシウムの田
水条件下での分解は、過酸化カルシウムより緩やかで、
長期間にわたって徐々に、種子周辺に酸素を供給しつづ
け得ることがわかる。 As is clear from Table 1, the decomposition of magnesium peroxide under flooded water is slower than that of calcium peroxide.
It is understood that oxygen can be continuously supplied to the periphery of the seed gradually over a long period of time.
試験例2 1/5000ワグネルポットに水田土壌を詰め、水深3cmに
なるように水を入れた。試験例1に準じて、有効酸素濃
度が同一になるように、過酸化マグネシウム、過酸化カ
ルシウムのそれぞれ28%、35%を含有する粉衣用製剤を
調製し、水稲種子(品種ハツボシ)1重量部に対し、調
製した粉衣用製剤の各1重量部を粉衣した。Test Example 2 A 1/5000 Wagner pot was filled with paddy soil, and water was added to a water depth of 3 cm. According to Test Example 1, a dressing preparation containing 28% and 35% of magnesium peroxide and calcium peroxide, respectively, was prepared so that the effective oxygen concentration was the same, and 1 weight of paddy rice seed (varieties beetle) was prepared. 1 part by weight of the prepared dressing preparation was coated on each part.
このようにして得た粉衣種子各40粒を、あらかじめ準
備したワグネルポットに、覆土深が2cmになるように播
種した後、ポットを19℃(高温区)と14℃(低温区)に
室温を設定した人工気象箱内に静置した。反復数は4と
した。Forty seeds of each dressing seed obtained in this way were sown in a prepared Wagner pot so that the soil cover depth would be 2 cm, and then the pot was placed at 19 ° C (high temperature zone) and 14 ° C (low temperature zone) at room temperature. It was left standing in the artificial weather box set with. The number of repeats was 4.
室温19℃に静置したものは、9日、12日および14日後
に、それぞれ出芽率を測定した。その結果を第2表に示
す。また、室温14℃に静置したものについては、21日後
の出芽率と、幼苗の芽の長さを測定した。その結果を第
3表に示す。The germination rate was measured after 9 days, 12 days, and 14 days, respectively, when the cells were left at room temperature of 19 ° C. Table 2 shows the results. In addition, for those left at room temperature of 14 ° C, the emergence rate after 21 days and the length of shoots of seedlings were measured. The results are shown in Table 3.
第2表、第3表から明らかなとおり、過酸化マグネシ
ウムを粉衣した水稲種子は、低温区、高温区とも早く発
芽をはじめ、良好な出芽率を示し、出芽した幼苗の芽の
長さも、明らかに伸長が促進されている。 As is apparent from Tables 2 and 3, the paddy rice seeds dressed with magnesium peroxide began to germinate early in both low temperature and high temperature groups and showed a good germination rate, and the bud length of the germinated seedlings was also Apparently the extension is promoted.
実用上、とくに平均気温の低い地域での湛水土壌中直
播栽培法では、初期生育を活発に維持させることが以降
の生育上きわめて重要な栽培管理上の要点であり、本発
明の有用性は明らかである。In practical use, particularly in the submerged soil direct seeding cultivation method in an area having a low average temperature, actively maintaining the initial growth is a very important point in the cultivation management after the growth, and the usefulness of the present invention is it is obvious.
試験例3 直径9cmのペトリ皿に、水酸化カルシウム、水酸化マ
グネシウムを所定の濃度になるように調製した溶液(一
部は飽和濃度以上のため懸濁液)20mlを入れ、これに水
稲種子(品種コシヒカリ)各10粒を置き、17℃の恒温器
内で生育管理し、7日後出芽した幼苗の鞘葉長を測定し
た。その結果は第4表のとおりである。Test Example 3 20 ml of a solution prepared by adjusting calcium hydroxide and magnesium hydroxide so as to have a predetermined concentration (a suspension partly having a saturated concentration or more) was placed in a petri dish having a diameter of 9 cm, and paddy rice seed ( 10 varieties of Koshihikari) were placed, the growth was controlled in a thermostat at 17 ° C., and the leaf length of the seedlings emerged after 7 days was measured. The results are shown in Table 4.
第4表から明らかなとおり、水酸化カルシウムの場合
には、濃度の増加にともない、稲に生育抑制が認められ
る。 As is clear from Table 4, in the case of calcium hydroxide, growth inhibition was observed in rice with increasing concentration.
実施例1 有効成分45%を含有する 過酸化マグネシウム 63部 焼石膏 25〃 炭酸カルシウム 12〃 上記混合し、有効酸素濃度約8%の粉衣用製剤を得
た。Example 1 Magnesium peroxide containing 45% of active ingredient 63 parts Calcined gypsum 25 〃 Calcium carbonate 12 〃 The above mixture was mixed to obtain a dressing preparation having an effective oxygen concentration of about 8%.
あらかじめ、比重1.13の食塩水で、選別した水稲種子
(品種ニホンバレ)の1重量部を水洗後、水を毎日とり
変えて4日間浸漬した。浸漬水を水切りした後、ベンレ
ート−T(殺菌剤、デュポン社商標)の2,000倍液に一
昼夜浸漬し種子消毒を行なった。In advance, 1 part by weight of the selected paddy rice seeds (cultivar Nihonbare) was washed with a saline solution having a specific gravity of 1.13, and then the water was changed daily and immersed for 4 days. After the immersion water was drained off, the seeds were disinfected by immersing it in a 2,000-fold solution of Benlate-T (bactericide, trademark of DuPont) for 24 hours.
この種子を回転式粉衣器に入れ、毎分23回転の速度で
回転させるながら、上記で調製した本発明による粉衣用
製剤の1重量部と水0.05重量部を徐々に加え、約20分間
で粉衣を完了した。The seeds were placed in a rotary dressing device, and 1 part by weight of the above-prepared dressing preparation of the present invention and 0.05 parts by weight of water were gradually added while rotating at a speed of 23 revolutions per minute for about 20 minutes. Completed the dressing with.
一方、対照の過酸化カルシウムについては、 有効成分50%を含有する 過酸化カルシウム 72部 焼石膏 25〃 炭酸カルシウム 3〃 からなる有効酸素濃度約8%の粉衣用製剤を調製し、前
記した過酸化マグネシウムの粉衣製剤に準じて粉衣し
た。On the other hand, with respect to the calcium peroxide as a control, a powdered drug formulation containing 72 parts of calcium peroxide containing 50% of active ingredient, 25 g of plaster of gypsum 25 〃 of calcium carbonate and 3 〃 of effective oxygen concentration was prepared. It was dressed according to the magnesium oxide dressing formulation.
ついで、あらかじめ代かきした湛水条件の水田に、手
押式播種機(多木農工具(株)製)を用いて、深さ約2c
mに、一平方米あたり種もみ換算で約4グラムとなるよ
うに播種した。播種直後、無作為に抽出した数ケ所の調
査区内の播種条1mあたりの播種粒数を計測し、この平均
値を播種実数の推定値とした。Then, using a hand-operated seeder (manufactured by Taki Nogyo Co., Ltd.), the depth of approximately 2c
The seeds were sown in an amount of about 4 grams per square meter of rice. Immediately after sowing, the number of seed grains per 1 m of seeding row in several randomly surveyed plots was measured, and the average value was used as the estimated value of the actual seeding number.
ついで、湛水深が3cmになるように水を入れた。 Then, water was added so that the water depth was 3 cm.
播種後、7、9、12、14日後に、無作為に抽出した反
復数を4とした調査区内の播種条1mあたりの出芽数を計
測し、これをあらかじめ計測してある播種実数推定値を
分母として出芽率を求めた。Seven, 9, 12, and 14 days after sowing, the number of sprouting per 1m of the seeding line in the survey area was set to 4 and the number of sprouting was estimated in advance. The sprouting rate was calculated with the denominator as.
なお、本実施例の播種前後の平均気温は約18℃であっ
た。結果を第5表に示す。The average temperature before and after sowing in this example was about 18 ° C. The results are shown in Table 5.
上表から明らかなとおり、本発明による過酸化マグネ
シウムの粉衣種子は、対照の過酸化カルシウムに比べ
て、出芽を始める日がすくなくとも2日以上早く、また
2週間後の出芽率も明らかに増加している。 As is apparent from the above table, the dressed seeds of magnesium peroxide according to the present invention have a germination start date that is at least 2 days earlier than that of the control calcium peroxide, and the germination rate after 2 weeks is significantly increased. are doing.
実施例2 有効成分45%を含有する 過酸化マグネシウム 63部 硫酸マグネシウム・一水塩 8〃 炭酸カルシウム 29〃 上記を混合し、有効酸素濃度約8%の粉衣用製剤を得
た。Example 2 Magnesium peroxide containing 45% of active ingredient 63 parts Magnesium sulfate / monohydrate 8 〃 Calcium carbonate 29 〃 The above ingredients were mixed to obtain a dressing preparation having an effective oxygen concentration of about 8%.
あらかじめ、塩水選した水稲種子(品種コガネバレ)
の1重量部を、水を毎日とり変えて4日間浸漬後、浸漬
水を水切りした後、ベンレートTの2,000倍液に一昼夜
浸漬し種子消毒を行なった。Pre-selected salt water-seeded rice seeds (cultivar Koganebale)
1 part by weight of water was changed every day for 4 days, the immersion water was drained off, and the seeds were disinfected by immersing the solution in 2,000 times of Benlate T for 24 hours.
この種子を、回転式粉衣器に入れ、毎分23回転の速度
で回転させながら、上記により調製した本発明による粉
衣用製剤の1重量部と水0.05重量部を徐々に加え、約20
分間で粉衣を完了した。The seeds were placed in a rotary dressing machine, and 1 part by weight of the above-prepared dressing preparation according to the present invention and 0.05 part by weight of water were gradually added while rotating at a speed of 23 rotations per minute to give about 20 parts.
Completed dressing in minutes.
一方、対照の過酸化カルシウムについては、 有効成分50%を含有する 過酸化カルシウム 72部 焼石膏 25〃 炭酸カルシウム 3〃 からなる有効酸素濃度約8%の粉衣用製剤を調製し、前
記した過酸化マグネシウムの粉衣用製剤と同様に粉衣処
理した。On the other hand, with respect to the calcium peroxide as a control, a powdered drug formulation containing 72 parts of calcium peroxide containing 50% of active ingredient, 25 g of plaster of gypsum 25 〃 of calcium carbonate and 3 〃 of effective oxygen concentration was prepared. The powder coating treatment was performed in the same manner as the magnesium oxide powder coating formulation.
ついで、あらかじめ代かきした湛水条件の水田に入力
式播種機(向井工業(株)製OH-192型)を用いて深さ約
1.5cmに、一平方米あたり種もみ換算で、約3グラムに
なるように播種した。播種直後、無作為に抽出した4ケ
所の調査区内の、播種条1メートルあたりの播種種子を
掘りおこして、播種粒数を計測し、これを平均して播種
実数の推定値を求めた。Then, using an input type seeder (OH-192 type manufactured by Mukai Kogyo Co., Ltd.) on the paddy field under submerged conditions that had been preliminarily submerged,
The seeds were sown in a size of 1.5 cm in an amount of about 3 grams per square meter of rice. Immediately after sowing, seeds per one meter of the seeding seed were dug up in four randomly surveyed plots, the number of seeds was measured, and this was averaged to obtain an estimated value of the actual number of seeds.
ついで、湛水深が4cmになるように入水した。 Then, water was poured so that the water depth was 4 cm.
播種後、5、7、9および12日後に、無作為に抽出し
た反復数を4とした調査区内の、播種条1メートルあた
りの出芽数を計測し、これを播種直後に堀りとって計測
した播種実数推定値を分母として、出芽率(%)を求め
た。Five, seven, nine and twelve days after sowing, the number of sprouting per meter of seeding row was measured in the survey area with a randomly selected repeat number of 4, and this was dug immediately after sowing. The emergence rate (%) was calculated by using the measured actual number of seeds as a denominator.
なお、本実施例の、播種前後の平均気温は約23℃であ
った。The average temperature before and after sowing in this example was about 23 ° C.
結果に第6表に示す。 The results are shown in Table 6.
第6表から明らかなとおり、本発明による過酸化マグ
ネシウムの粉衣種子は、対照の過酸化カルシウムの粉衣
種子より早く発芽をはじめ、かつ、各測定時において有
意の出芽率の増加がみとめられた。 As is clear from Table 6, the magnesium peroxide dressed seeds according to the present invention started to germinate earlier than the control calcium peroxide dressed seeds, and a significant increase in the germination rate was observed at each measurement. It was
本発明の、水稲種子の発芽を促進する方法によれば、
過酸化マグネシウムの田水中での分解は過酸化カルシウ
ムよりも緩やかで、長期間にわたって種子に酸素を供給
し得る。また、分解生成物の水酸化マグネシウムは水酸
化カルシウムよりもpHが低く、稲に対する薬害を起こし
にくい。湛水条件下の水田土壌中に、本発明の方法によ
る水稲種子を播種した場合、早く発芽をはじめ、また出
芽率も向上する。特に過酸化カルシウムが使用できなく
なる寒冷地において効果が顕著に発揮される。According to the method of the present invention for promoting germination of paddy rice seeds,
Degradation of magnesium peroxide in paddy water is slower than that of calcium peroxide and can supply oxygen to seeds for a long period of time. In addition, the decomposition product magnesium hydroxide has a lower pH than calcium hydroxide and is less likely to cause chemical damage to rice. When rice seeds are sown by the method of the present invention in paddy soil under flooded conditions, germination starts early and the emergence rate is improved. In particular, the effect is remarkably exhibited in cold regions where calcium peroxide cannot be used.
Claims (1)
機固着剤を粉衣させることを特徴とする水稲種子の発芽
を促進する方法。1. A method for promoting germination of paddy rice seeds, which comprises dressing paddy rice seeds with magnesium peroxide and an inorganic fixing agent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60004965A JP2516330B2 (en) | 1985-01-17 | 1985-01-17 | How to promote rice seed germination |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60004965A JP2516330B2 (en) | 1985-01-17 | 1985-01-17 | How to promote rice seed germination |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61166304A JPS61166304A (en) | 1986-07-28 |
JP2516330B2 true JP2516330B2 (en) | 1996-07-24 |
Family
ID=11598300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60004965A Expired - Lifetime JP2516330B2 (en) | 1985-01-17 | 1985-01-17 | How to promote rice seed germination |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2516330B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2932842A1 (en) * | 2014-04-16 | 2015-10-21 | Syngenta Participations AG. | Rice seed treatment composition and method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2452861A1 (en) * | 1979-04-02 | 1980-10-31 | Interox | Coating seeds with mixt. of peroxide and hydrophilic polymer - e.g. polyvinyl:pyrrolidone, after moistening with aq. soln. |
JPS606105A (en) * | 1983-06-22 | 1985-01-12 | 保土谷化学工業株式会社 | Improved spraying method of powdery chemicals to rice seed |
-
1985
- 1985-01-17 JP JP60004965A patent/JP2516330B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2932842A1 (en) * | 2014-04-16 | 2015-10-21 | Syngenta Participations AG. | Rice seed treatment composition and method |
WO2015158695A1 (en) * | 2014-04-16 | 2015-10-22 | Syngenta Participations Ag | Rice seed treatment composition and method |
Also Published As
Publication number | Publication date |
---|---|
JPS61166304A (en) | 1986-07-28 |
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