タイトル |
愛知式不耕起直播における鳥害回避策 |
担当機関 |
愛知農業総合試験場 |
研究期間 |
1999~1999 |
研究担当者 |
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発行年度 |
1999 |
要約 |
愛知式不耕起播種機による直播栽培では、播種前の冬季代かきと作溝輪の改良(播種溝開口部を2cmに狭める)によって覆土が不十分な場合でも鳥害回避が可能となる。
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背景・ねらい |
これまで、出芽期の鳥害は、水稲直播栽培の普及拡大を阻害する大きな要因のひとつになってきた。そこで、愛知式不耕起播種機による直播栽培での鳥害回避策を確立し、水稲直播栽培の飛躍的な普及拡大に資する。
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成果の内容・特徴 |
- 完全不耕起や浅耕では播種深度が浅く覆土が不十分となりやすいため、播種直後から出芽までの間スズメ、ハト、カラス等の食害を受ける(図1、図2、表1)。また、播種深度が2~2.5cmより浅い場合、出芽した幼苗が種子とともに抜き取られる(表1、図3)。
- 播種前処理として冬季代かきを実施すると、播種精度が著しく高まり播種深度が3~5cmと深く確保される(図4)ため鳥害が少ない(図2)。
- 愛知式不耕起播種機の作溝輪を改良し播種溝の開口部を2cm(従来は3cm)と狭めることにより、播種後覆土が不十分の場合でも鳥害回避が可能となる。平成9年度(開口部3cm)には覆土が不十分な場合、調査ほ場の2~3%で堀り取りや抜き取りなどによる鳥害が発生し裁培の継続が不可能となった。しかし、平成10、11年(開口部2cm)にはそうしたほ場は皆無であった(図2)。
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成果の活用面・留意点 |
- 播種前処理が夏・秋季代の場合でも冬季代かきと同様に播種精度が確保されるので、鳥害回避が可能である。
- 作業分散の必要から2月中旬から4月上旬に播種期を早めても鳥害の心配はない。
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図表1 |
![215962-1.gif](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/215962-1.gif?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBMaDmFwLW5vcnRoZWFzdC0xIkYwRAIgEqoDzEMVb1uHAksDAaFimG9aEbP21Td9ktb8mhUVshsCICpshENSoBFxFRq%2BXUb5NYaHNeDfc2WXhNVf0GNw%2FHotKpkECK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMNTMyMzMxMDcyMDQxIgzbpt9N2fIrzxlIruMq7QNw3JXmE1GWSc3TdsmwuAcY9UW68dW0qP825hoCQ1EvP7LDIsFklkpgQwv8pgK07at22eNi5wKa0poAGb4SWdABXCvTEUaTwAmzBz%2FyhLTVQUK0YC5o%2BLscr29OeLknzCJxWqDgg0YVvhf60fhRsAQj7Q40Z6QuXU4VWb%2BbajVAw2RsSBLwQ5KoWYtq0K%2Fw5DEcJD8g8uayKQyzKKfEkXX1ZgGCZ4JCEwTPR0wamR0odT9QLW0ki%2Bp5SRDMktGRo5IrXniOBiZOAq6mGOisi%2BGYYydgCRtnTmhk4o9ezq8r08KNbpvSMJk7FSBhYTr4RvL1VcY056GLoMOm%2FiezAbAK7DGemqFAuVLAr0KBWRuIFV40%2BcYYqsQ9gs2GThB3hb837vWFnNmh3ZcR8slZmuGW0J2u6k09P5HoC%2Fl6aBtyDzltzwB6oSReFqp6B5G4acHlnPMZpjs5L%2FDZk89xJve2ROgMkZ0m3ui6w%2BZ7rgZoBtHXBzkGG6dlqxlDYbM3azAvv4jqNa2CCTdaHOzy7kQUpF6YC%2FFBGF1cWLAhl7jueUAtpqzZcvZD3cQirWlwledBVRbwNQ%2Bb7MRyMO1IO3UlhEf5Q%2FhOP4RqFdvAvOXrCpjKDgoz1n5csrZKp4KONSUKa6mf%2FpDFXcW3WRHPMPmxsrMGOqcBxu7F5PEizRNP4CWjxftc9syw%2Fij2nsUowsTfMR%2FMFvIgwpLwqyHopBNajbjMcbmO95%2B617E5BXI5LGK%2B5sIKaVyAV1mldCINDATe6726v04SsAZMKjnOaACQxRxYE%2BX%2FbvG4%2BicochISSj7tJt2YgMRstNidv0qMzbOZRDV9H6EEvrElxIKJeUK9m1ySfse1u1eWs4t%2B2wL2wBaug8qbqfKuTjMKp08%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIUY75H3SGV%2F20240614%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240614T194842Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=06eac18183ed9cc3ffa23348167a8e9df6133111e27350f7cba609a25a0dc1f7) |
図表2 |
![215962-2.gif](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/215962-2.gif?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBMaDmFwLW5vcnRoZWFzdC0xIkYwRAIgEqoDzEMVb1uHAksDAaFimG9aEbP21Td9ktb8mhUVshsCICpshENSoBFxFRq%2BXUb5NYaHNeDfc2WXhNVf0GNw%2FHotKpkECK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMNTMyMzMxMDcyMDQxIgzbpt9N2fIrzxlIruMq7QNw3JXmE1GWSc3TdsmwuAcY9UW68dW0qP825hoCQ1EvP7LDIsFklkpgQwv8pgK07at22eNi5wKa0poAGb4SWdABXCvTEUaTwAmzBz%2FyhLTVQUK0YC5o%2BLscr29OeLknzCJxWqDgg0YVvhf60fhRsAQj7Q40Z6QuXU4VWb%2BbajVAw2RsSBLwQ5KoWYtq0K%2Fw5DEcJD8g8uayKQyzKKfEkXX1ZgGCZ4JCEwTPR0wamR0odT9QLW0ki%2Bp5SRDMktGRo5IrXniOBiZOAq6mGOisi%2BGYYydgCRtnTmhk4o9ezq8r08KNbpvSMJk7FSBhYTr4RvL1VcY056GLoMOm%2FiezAbAK7DGemqFAuVLAr0KBWRuIFV40%2BcYYqsQ9gs2GThB3hb837vWFnNmh3ZcR8slZmuGW0J2u6k09P5HoC%2Fl6aBtyDzltzwB6oSReFqp6B5G4acHlnPMZpjs5L%2FDZk89xJve2ROgMkZ0m3ui6w%2BZ7rgZoBtHXBzkGG6dlqxlDYbM3azAvv4jqNa2CCTdaHOzy7kQUpF6YC%2FFBGF1cWLAhl7jueUAtpqzZcvZD3cQirWlwledBVRbwNQ%2Bb7MRyMO1IO3UlhEf5Q%2FhOP4RqFdvAvOXrCpjKDgoz1n5csrZKp4KONSUKa6mf%2FpDFXcW3WRHPMPmxsrMGOqcBxu7F5PEizRNP4CWjxftc9syw%2Fij2nsUowsTfMR%2FMFvIgwpLwqyHopBNajbjMcbmO95%2B617E5BXI5LGK%2B5sIKaVyAV1mldCINDATe6726v04SsAZMKjnOaACQxRxYE%2BX%2FbvG4%2BicochISSj7tJt2YgMRstNidv0qMzbOZRDV9H6EEvrElxIKJeUK9m1ySfse1u1eWs4t%2B2wL2wBaug8qbqfKuTjMKp08%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIUY75H3SGV%2F20240614%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240614T194842Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=51f069ed83ff8224bb2d949c44f534094dc6dc179b4e3ad64fa00de1d3e84255) |
図表3 |
![215962-3.gif](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/215962-3.gif?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBMaDmFwLW5vcnRoZWFzdC0xIkYwRAIgEqoDzEMVb1uHAksDAaFimG9aEbP21Td9ktb8mhUVshsCICpshENSoBFxFRq%2BXUb5NYaHNeDfc2WXhNVf0GNw%2FHotKpkECK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMNTMyMzMxMDcyMDQxIgzbpt9N2fIrzxlIruMq7QNw3JXmE1GWSc3TdsmwuAcY9UW68dW0qP825hoCQ1EvP7LDIsFklkpgQwv8pgK07at22eNi5wKa0poAGb4SWdABXCvTEUaTwAmzBz%2FyhLTVQUK0YC5o%2BLscr29OeLknzCJxWqDgg0YVvhf60fhRsAQj7Q40Z6QuXU4VWb%2BbajVAw2RsSBLwQ5KoWYtq0K%2Fw5DEcJD8g8uayKQyzKKfEkXX1ZgGCZ4JCEwTPR0wamR0odT9QLW0ki%2Bp5SRDMktGRo5IrXniOBiZOAq6mGOisi%2BGYYydgCRtnTmhk4o9ezq8r08KNbpvSMJk7FSBhYTr4RvL1VcY056GLoMOm%2FiezAbAK7DGemqFAuVLAr0KBWRuIFV40%2BcYYqsQ9gs2GThB3hb837vWFnNmh3ZcR8slZmuGW0J2u6k09P5HoC%2Fl6aBtyDzltzwB6oSReFqp6B5G4acHlnPMZpjs5L%2FDZk89xJve2ROgMkZ0m3ui6w%2BZ7rgZoBtHXBzkGG6dlqxlDYbM3azAvv4jqNa2CCTdaHOzy7kQUpF6YC%2FFBGF1cWLAhl7jueUAtpqzZcvZD3cQirWlwledBVRbwNQ%2Bb7MRyMO1IO3UlhEf5Q%2FhOP4RqFdvAvOXrCpjKDgoz1n5csrZKp4KONSUKa6mf%2FpDFXcW3WRHPMPmxsrMGOqcBxu7F5PEizRNP4CWjxftc9syw%2Fij2nsUowsTfMR%2FMFvIgwpLwqyHopBNajbjMcbmO95%2B617E5BXI5LGK%2B5sIKaVyAV1mldCINDATe6726v04SsAZMKjnOaACQxRxYE%2BX%2FbvG4%2BicochISSj7tJt2YgMRstNidv0qMzbOZRDV9H6EEvrElxIKJeUK9m1ySfse1u1eWs4t%2B2wL2wBaug8qbqfKuTjMKp08%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIUY75H3SGV%2F20240614%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240614T194842Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=1cf3f2e480f5ab8b6b61a244a07319d6981c6aa166e9b055859ce324bb1ae005) |
図表4 |
![215962-4.gif](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/215962-4.gif?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBMaDmFwLW5vcnRoZWFzdC0xIkYwRAIgEqoDzEMVb1uHAksDAaFimG9aEbP21Td9ktb8mhUVshsCICpshENSoBFxFRq%2BXUb5NYaHNeDfc2WXhNVf0GNw%2FHotKpkECK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMNTMyMzMxMDcyMDQxIgzbpt9N2fIrzxlIruMq7QNw3JXmE1GWSc3TdsmwuAcY9UW68dW0qP825hoCQ1EvP7LDIsFklkpgQwv8pgK07at22eNi5wKa0poAGb4SWdABXCvTEUaTwAmzBz%2FyhLTVQUK0YC5o%2BLscr29OeLknzCJxWqDgg0YVvhf60fhRsAQj7Q40Z6QuXU4VWb%2BbajVAw2RsSBLwQ5KoWYtq0K%2Fw5DEcJD8g8uayKQyzKKfEkXX1ZgGCZ4JCEwTPR0wamR0odT9QLW0ki%2Bp5SRDMktGRo5IrXniOBiZOAq6mGOisi%2BGYYydgCRtnTmhk4o9ezq8r08KNbpvSMJk7FSBhYTr4RvL1VcY056GLoMOm%2FiezAbAK7DGemqFAuVLAr0KBWRuIFV40%2BcYYqsQ9gs2GThB3hb837vWFnNmh3ZcR8slZmuGW0J2u6k09P5HoC%2Fl6aBtyDzltzwB6oSReFqp6B5G4acHlnPMZpjs5L%2FDZk89xJve2ROgMkZ0m3ui6w%2BZ7rgZoBtHXBzkGG6dlqxlDYbM3azAvv4jqNa2CCTdaHOzy7kQUpF6YC%2FFBGF1cWLAhl7jueUAtpqzZcvZD3cQirWlwledBVRbwNQ%2Bb7MRyMO1IO3UlhEf5Q%2FhOP4RqFdvAvOXrCpjKDgoz1n5csrZKp4KONSUKa6mf%2FpDFXcW3WRHPMPmxsrMGOqcBxu7F5PEizRNP4CWjxftc9syw%2Fij2nsUowsTfMR%2FMFvIgwpLwqyHopBNajbjMcbmO95%2B617E5BXI5LGK%2B5sIKaVyAV1mldCINDATe6726v04SsAZMKjnOaACQxRxYE%2BX%2FbvG4%2BicochISSj7tJt2YgMRstNidv0qMzbOZRDV9H6EEvrElxIKJeUK9m1ySfse1u1eWs4t%2B2wL2wBaug8qbqfKuTjMKp08%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIUY75H3SGV%2F20240614%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240614T194842Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=ae18bcf2b5704eca099ad05780689e6316b8c37f0fa00aad67116029c7695f66) |
図表5 |
![215962-5.gif](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/215962-5.gif?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEBMaDmFwLW5vcnRoZWFzdC0xIkYwRAIgEqoDzEMVb1uHAksDAaFimG9aEbP21Td9ktb8mhUVshsCICpshENSoBFxFRq%2BXUb5NYaHNeDfc2WXhNVf0GNw%2FHotKpkECK3%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAhoMNTMyMzMxMDcyMDQxIgzbpt9N2fIrzxlIruMq7QNw3JXmE1GWSc3TdsmwuAcY9UW68dW0qP825hoCQ1EvP7LDIsFklkpgQwv8pgK07at22eNi5wKa0poAGb4SWdABXCvTEUaTwAmzBz%2FyhLTVQUK0YC5o%2BLscr29OeLknzCJxWqDgg0YVvhf60fhRsAQj7Q40Z6QuXU4VWb%2BbajVAw2RsSBLwQ5KoWYtq0K%2Fw5DEcJD8g8uayKQyzKKfEkXX1ZgGCZ4JCEwTPR0wamR0odT9QLW0ki%2Bp5SRDMktGRo5IrXniOBiZOAq6mGOisi%2BGYYydgCRtnTmhk4o9ezq8r08KNbpvSMJk7FSBhYTr4RvL1VcY056GLoMOm%2FiezAbAK7DGemqFAuVLAr0KBWRuIFV40%2BcYYqsQ9gs2GThB3hb837vWFnNmh3ZcR8slZmuGW0J2u6k09P5HoC%2Fl6aBtyDzltzwB6oSReFqp6B5G4acHlnPMZpjs5L%2FDZk89xJve2ROgMkZ0m3ui6w%2BZ7rgZoBtHXBzkGG6dlqxlDYbM3azAvv4jqNa2CCTdaHOzy7kQUpF6YC%2FFBGF1cWLAhl7jueUAtpqzZcvZD3cQirWlwledBVRbwNQ%2Bb7MRyMO1IO3UlhEf5Q%2FhOP4RqFdvAvOXrCpjKDgoz1n5csrZKp4KONSUKa6mf%2FpDFXcW3WRHPMPmxsrMGOqcBxu7F5PEizRNP4CWjxftc9syw%2Fij2nsUowsTfMR%2FMFvIgwpLwqyHopBNajbjMcbmO95%2B617E5BXI5LGK%2B5sIKaVyAV1mldCINDATe6726v04SsAZMKjnOaACQxRxYE%2BX%2FbvG4%2BicochISSj7tJt2YgMRstNidv0qMzbOZRDV9H6EEvrElxIKJeUK9m1ySfse1u1eWs4t%2B2wL2wBaug8qbqfKuTjMKp08%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIUY75H3SGV%2F20240614%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240614T194842Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=8db42839ce199f245f5610c46bb980d91117c334579a3b93c664084062a8fb91) |
カテゴリ |
直播栽培
水稲
鳥害
播種
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