タイトル |
砂質浅耕土地帯におけるコシヒカリ条播栽培の適正生育量 |
担当機関 |
富山県農業技術センター |
研究期間 |
2000~2000 |
研究担当者 |
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発行年度 |
2000 |
要約 |
収量、品質面からみた砂質浅耕土地帯におけるコシヒカリ条播栽培での適正着粒数は27,000~27,500粒/㎡である。また、この適正着粒数を得るための幼穂形成期における草丈×茎数×葉色値は140,000程度である。
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背景・ねらい |
富山県においては直播栽培面積が年々増加しており,平成12年度の直播面積が435ha,うち条播栽培面積は330haとなっている.また,富山型直播のキーワードとして「コシヒカリを中心とした」とあるように,県内での直播では「コシヒカリ」が大部分で栽培されている.現在,「コシヒカリ」の条播栽培は従来からの移植栽培の診断技術をもとに組み立てられており,このような状況の中で,条播栽培独自の高品質・良食味栽培技術の確立が望まれている.そこで,収量,品質面からみた適正着粒数を明らかにし,幼穂形成期における適正生育量を提示する.
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成果の内容・特徴 |
- ㎡当たり着粒数が27,500粒程度で収量は最も高くなる(図1)。また,着粒数が27,000~27,500粒を越えると玄米品質は低下する(図2)。さらに,着粒数が27,500粒を越えると倒伏程度が高くなる(図3)。これらのことから,収量(515㎏/10a),品質(完全粒歩合80%以上)面からみた条播栽培における適正着粒数は27,000~27,500粒である.
- 幼穂形成期における草丈(cm)×茎数(本/㎡)×葉色値(群落葉色)と㎡当たり着粒数の間には非常に高い相関関係(R2=0.9015)があり,着粒数27,000~27,500粒を得るための幼穂形成期の草丈×茎数×葉色値は140,000程度である(図4)。
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成果の活用面・留意点 |
- コシヒカリの条播栽培に適用できる.また,播種時期は4月下旬~5月上旬,苗立本数は40~80本/㎡とする.
- 1回目の穂肥は出穂前15日(幼穂形成期後7日目,幼穂長15㎜程度)にN1.5㎏/10a施用する.また,穂肥施用量は2回目を合わせてN3.0㎏/10a以下とする.
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図表1 |
![214455-1.JPG](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/214455-1.JPG?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHQaDmFwLW5vcnRoZWFzdC0xIkcwRQIgW%2BrLpYnepsXBjQFMquMWELzbnjIVMGNkq3%2FEmU07KZcCIQCVSAYfQaZOfnOHT2MhYljk%2BIeRo9UvXyuUNMhj%2FmELqCqQBAgdEAIaDDUzMjMzMTA3MjA0MSIM8vYZFwlvYdHjFdX0Ku0DEvYB0%2FxG%2BpelvgqzBO5BKNSXEUlXRS9mtC8LH1w03kOymnDRZderi%2BrRf9uJLoNG53F%2B7FnfB5zf4saGP32AqC4H%2BzWXE48obN%2BvYMl2mnyI2Ve1M%2BgI6ShUzsrwKOZGWLwcuyAwd4PyusZP0zOsfTE47YOhgzR4Qzu8bwbm9kJ3mu8A7EZsdzu3U0f1ux0QkNC22slwmYiaQltaGEh9bHqQUg%2FDnUCgFdRzwq4eTlNx%2FS8wM44XwVWttQ5zM0dooIDe%2B%2FYhZlI2qXIjizBpDM3kwhqnknPeOSf1I0jgPHgZzxpMLUzjajJJkNukE8jXd882ZlZ%2BmmHXCOqHWgp6YCHBXRDOpPk8ParVMYOuzWkmkYN3e2QP1RyOii5PZ0Uzor%2Fd8KdD08UQ8DQ3JyQ51W6KcmLJK0Wvt0DCnm95y94XsBAb0JOBITsp8wbMYwYSBjXMIEu3y%2Ffw94%2FNbdtF5IYm7UBnR8qxyeFim%2BDDrYArUz6ExfXrkAvS7iU%2F0duryzeoTT8ttqUG%2BamV%2BFgPwXo%2FtEmqwbbwj1jn6VqD7bcRbNfEYhzjtFp54JfB9ThJGBtSLc0sR5b5y%2FJcmvr2uGNOh%2FiA4NMFXhLuTplhDK9PkjD2nwBv8hl%2BRSdDReSmETMNLyk%2Fpr5q%2BIFGMDD1ysezBjqmAVGKC%2B265ghMA3LCFt8DGJ2%2FKQcuBlBCLnXN9hs4mIM0qacI5FobfS16KmWTO2NFHkmuYgVaiQY0g9B%2Banwm1W6%2FSBEs5rXdgALW0bjb9LYJIUFBCxDE97eKekJixegmKo%2F8uMAYUwQUz7waSpfCxHAKjK%2Bj%2Frx8oTI9rrPpfDhZ3%2FxXmlz4bxbMPix8B1lWevnatuVt%2FDuJOOQsKW2BN9WQtgvo8vY%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU5S4BXQFX%2F20240618%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240618T195701Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=4f40a8fe665080910ceb0c011959d26d8f46845ec473ffb705d79ce3b9de2a65) |
図表2 |
![214455-2.JPG](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/214455-2.JPG?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHQaDmFwLW5vcnRoZWFzdC0xIkcwRQIgW%2BrLpYnepsXBjQFMquMWELzbnjIVMGNkq3%2FEmU07KZcCIQCVSAYfQaZOfnOHT2MhYljk%2BIeRo9UvXyuUNMhj%2FmELqCqQBAgdEAIaDDUzMjMzMTA3MjA0MSIM8vYZFwlvYdHjFdX0Ku0DEvYB0%2FxG%2BpelvgqzBO5BKNSXEUlXRS9mtC8LH1w03kOymnDRZderi%2BrRf9uJLoNG53F%2B7FnfB5zf4saGP32AqC4H%2BzWXE48obN%2BvYMl2mnyI2Ve1M%2BgI6ShUzsrwKOZGWLwcuyAwd4PyusZP0zOsfTE47YOhgzR4Qzu8bwbm9kJ3mu8A7EZsdzu3U0f1ux0QkNC22slwmYiaQltaGEh9bHqQUg%2FDnUCgFdRzwq4eTlNx%2FS8wM44XwVWttQ5zM0dooIDe%2B%2FYhZlI2qXIjizBpDM3kwhqnknPeOSf1I0jgPHgZzxpMLUzjajJJkNukE8jXd882ZlZ%2BmmHXCOqHWgp6YCHBXRDOpPk8ParVMYOuzWkmkYN3e2QP1RyOii5PZ0Uzor%2Fd8KdD08UQ8DQ3JyQ51W6KcmLJK0Wvt0DCnm95y94XsBAb0JOBITsp8wbMYwYSBjXMIEu3y%2Ffw94%2FNbdtF5IYm7UBnR8qxyeFim%2BDDrYArUz6ExfXrkAvS7iU%2F0duryzeoTT8ttqUG%2BamV%2BFgPwXo%2FtEmqwbbwj1jn6VqD7bcRbNfEYhzjtFp54JfB9ThJGBtSLc0sR5b5y%2FJcmvr2uGNOh%2FiA4NMFXhLuTplhDK9PkjD2nwBv8hl%2BRSdDReSmETMNLyk%2Fpr5q%2BIFGMDD1ysezBjqmAVGKC%2B265ghMA3LCFt8DGJ2%2FKQcuBlBCLnXN9hs4mIM0qacI5FobfS16KmWTO2NFHkmuYgVaiQY0g9B%2Banwm1W6%2FSBEs5rXdgALW0bjb9LYJIUFBCxDE97eKekJixegmKo%2F8uMAYUwQUz7waSpfCxHAKjK%2Bj%2Frx8oTI9rrPpfDhZ3%2FxXmlz4bxbMPix8B1lWevnatuVt%2FDuJOOQsKW2BN9WQtgvo8vY%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU5S4BXQFX%2F20240618%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240618T195701Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=58f7692a4d6552cab2beaa422e533dff3ee17c285a0f28d3e832d2d6841f0b0a) |
図表3 |
![214455-3.JPG](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/214455-3.JPG?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHQaDmFwLW5vcnRoZWFzdC0xIkcwRQIgW%2BrLpYnepsXBjQFMquMWELzbnjIVMGNkq3%2FEmU07KZcCIQCVSAYfQaZOfnOHT2MhYljk%2BIeRo9UvXyuUNMhj%2FmELqCqQBAgdEAIaDDUzMjMzMTA3MjA0MSIM8vYZFwlvYdHjFdX0Ku0DEvYB0%2FxG%2BpelvgqzBO5BKNSXEUlXRS9mtC8LH1w03kOymnDRZderi%2BrRf9uJLoNG53F%2B7FnfB5zf4saGP32AqC4H%2BzWXE48obN%2BvYMl2mnyI2Ve1M%2BgI6ShUzsrwKOZGWLwcuyAwd4PyusZP0zOsfTE47YOhgzR4Qzu8bwbm9kJ3mu8A7EZsdzu3U0f1ux0QkNC22slwmYiaQltaGEh9bHqQUg%2FDnUCgFdRzwq4eTlNx%2FS8wM44XwVWttQ5zM0dooIDe%2B%2FYhZlI2qXIjizBpDM3kwhqnknPeOSf1I0jgPHgZzxpMLUzjajJJkNukE8jXd882ZlZ%2BmmHXCOqHWgp6YCHBXRDOpPk8ParVMYOuzWkmkYN3e2QP1RyOii5PZ0Uzor%2Fd8KdD08UQ8DQ3JyQ51W6KcmLJK0Wvt0DCnm95y94XsBAb0JOBITsp8wbMYwYSBjXMIEu3y%2Ffw94%2FNbdtF5IYm7UBnR8qxyeFim%2BDDrYArUz6ExfXrkAvS7iU%2F0duryzeoTT8ttqUG%2BamV%2BFgPwXo%2FtEmqwbbwj1jn6VqD7bcRbNfEYhzjtFp54JfB9ThJGBtSLc0sR5b5y%2FJcmvr2uGNOh%2FiA4NMFXhLuTplhDK9PkjD2nwBv8hl%2BRSdDReSmETMNLyk%2Fpr5q%2BIFGMDD1ysezBjqmAVGKC%2B265ghMA3LCFt8DGJ2%2FKQcuBlBCLnXN9hs4mIM0qacI5FobfS16KmWTO2NFHkmuYgVaiQY0g9B%2Banwm1W6%2FSBEs5rXdgALW0bjb9LYJIUFBCxDE97eKekJixegmKo%2F8uMAYUwQUz7waSpfCxHAKjK%2Bj%2Frx8oTI9rrPpfDhZ3%2FxXmlz4bxbMPix8B1lWevnatuVt%2FDuJOOQsKW2BN9WQtgvo8vY%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU5S4BXQFX%2F20240618%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240618T195701Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=3705a50f5a4658813452e0ea1543de8da712f3753383a275b0a560e48c34d4c2) |
図表4 |
![214455-4.JPG](https://s3-agre-content.s3.ap-northeast-1.amazonaws.com/assets/images/seika_chart/214455-4.JPG?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEHQaDmFwLW5vcnRoZWFzdC0xIkcwRQIgW%2BrLpYnepsXBjQFMquMWELzbnjIVMGNkq3%2FEmU07KZcCIQCVSAYfQaZOfnOHT2MhYljk%2BIeRo9UvXyuUNMhj%2FmELqCqQBAgdEAIaDDUzMjMzMTA3MjA0MSIM8vYZFwlvYdHjFdX0Ku0DEvYB0%2FxG%2BpelvgqzBO5BKNSXEUlXRS9mtC8LH1w03kOymnDRZderi%2BrRf9uJLoNG53F%2B7FnfB5zf4saGP32AqC4H%2BzWXE48obN%2BvYMl2mnyI2Ve1M%2BgI6ShUzsrwKOZGWLwcuyAwd4PyusZP0zOsfTE47YOhgzR4Qzu8bwbm9kJ3mu8A7EZsdzu3U0f1ux0QkNC22slwmYiaQltaGEh9bHqQUg%2FDnUCgFdRzwq4eTlNx%2FS8wM44XwVWttQ5zM0dooIDe%2B%2FYhZlI2qXIjizBpDM3kwhqnknPeOSf1I0jgPHgZzxpMLUzjajJJkNukE8jXd882ZlZ%2BmmHXCOqHWgp6YCHBXRDOpPk8ParVMYOuzWkmkYN3e2QP1RyOii5PZ0Uzor%2Fd8KdD08UQ8DQ3JyQ51W6KcmLJK0Wvt0DCnm95y94XsBAb0JOBITsp8wbMYwYSBjXMIEu3y%2Ffw94%2FNbdtF5IYm7UBnR8qxyeFim%2BDDrYArUz6ExfXrkAvS7iU%2F0duryzeoTT8ttqUG%2BamV%2BFgPwXo%2FtEmqwbbwj1jn6VqD7bcRbNfEYhzjtFp54JfB9ThJGBtSLc0sR5b5y%2FJcmvr2uGNOh%2FiA4NMFXhLuTplhDK9PkjD2nwBv8hl%2BRSdDReSmETMNLyk%2Fpr5q%2BIFGMDD1ysezBjqmAVGKC%2B265ghMA3LCFt8DGJ2%2FKQcuBlBCLnXN9hs4mIM0qacI5FobfS16KmWTO2NFHkmuYgVaiQY0g9B%2Banwm1W6%2FSBEs5rXdgALW0bjb9LYJIUFBCxDE97eKekJixegmKo%2F8uMAYUwQUz7waSpfCxHAKjK%2Bj%2Frx8oTI9rrPpfDhZ3%2FxXmlz4bxbMPix8B1lWevnatuVt%2FDuJOOQsKW2BN9WQtgvo8vY%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAXX4LHRIU5S4BXQFX%2F20240618%2Fap-northeast-1%2Fs3%2Faws4_request&X-Amz-Date=20240618T195701Z&X-Amz-SignedHeaders=host&X-Amz-Expires=1800&X-Amz-Signature=8676b5120e7e377ce2ea2a5b1c68116c24303dd030e6883b1bb89138109da044) |
カテゴリ |
栽培技術
直播栽培
診断技術
播種
良食味
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